JP2910020B2 - Aluminum oxide-zirconium oxide sintered ceramics with excellent toughness - Google Patents
Aluminum oxide-zirconium oxide sintered ceramics with excellent toughnessInfo
- Publication number
- JP2910020B2 JP2910020B2 JP4129973A JP12997392A JP2910020B2 JP 2910020 B2 JP2910020 B2 JP 2910020B2 JP 4129973 A JP4129973 A JP 4129973A JP 12997392 A JP12997392 A JP 12997392A JP 2910020 B2 JP2910020 B2 JP 2910020B2
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- cutting
- zro
- powder
- sintered ceramics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000919 ceramic Substances 0.000 title claims description 34
- VCRLKNZXFXIDSC-UHFFFAOYSA-N aluminum oxygen(2-) zirconium(4+) Chemical compound [O--].[O--].[Al+3].[Zr+4] VCRLKNZXFXIDSC-UHFFFAOYSA-N 0.000 title claims 4
- 239000013078 crystal Substances 0.000 claims description 14
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims 4
- 239000002253 acid Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 description 27
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 24
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 150000004703 alkoxides Chemical class 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- -1 metal oxide compounds Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、すぐれた靭性を有
し、例えば切削工具として用いた場合に、鋼の連続切削
は勿論のこと、特に高靭性が要求される鋼の断続切削に
用いた場合にも切刃に欠損やチッピングなどの発生な
く、すぐれた切削性能を発揮する酸化アルミニウム（以
下、Ａｌ2 Ｏ3 で示す）−酸化ジルコニウム（以下、Ｚ
ｒＯ2 で示す）系焼結セラミックスに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has excellent toughness, and is used not only for continuous cutting of steel but also for intermittent cutting of steel requiring high toughness, for example, when used as a cutting tool. In this case, aluminum oxide (hereinafter, referred to as Al 2 O 3 ) -zirconium oxide (hereinafter, Z) exhibits excellent cutting performance without occurrence of chipping or chipping on the cutting edge.
rO 2 ) based sintered ceramics.
【０００２】[0002]
【従来の技術】従来、例えば特公昭５９−６２７４号公
報に記載される通り、Ａｌ2 Ｏ3 と、ＺｒＯ2 並びにこ
れにＭｇＯ、Ｙ2 Ｏ3 、およびＣｅＯ2 などのうちの１
種以上を１〜１２モル％の割合で含有させてなる部分安
定化ＺｒＯ2 のいずれか、または両方を主成分とし、か
つ図２の走査型電子顕微鏡による組織写真に例示される
微細組織をもったＡｌ2 Ｏ3 −ＺｒＯ2 系焼結セラミッ
クスが知られており、これが切削工具として、主に鋼な
どの連続切削に用いられていることは良く知られるとこ
ろである。2. Description of the Related Art Conventionally, as described in Japanese Patent Publication No. 59-6274, for example, Al 2 O 3 , ZrO 2 and one of MgO, Y 2 O 3 , CeO 2, etc.
A microstructure exemplified by a structure photograph of a scanning electron microscope shown in FIG. 2 mainly containing one or both of partially stabilized ZrO 2 containing at least one species in a ratio of 1 to 12 mol%. and Al 2 O 3 -ZrO 2 sintered ceramics are known, which as a cutting tool, it is where the well-known mainly used for continuous cutting such as steel.
【０００３】また、これらの従来Ａｌ2 Ｏ3 −ＺｒＯ2
系焼結ラミックスが、上記公告公報にも記載される通
り、原料粉末として、Ａｌ2 Ｏ3 粉末、ＺｒＯ2 粉末、
および部分安定化ＺｒＯ2 粉末などを用い、これら原料
粉末を所定の配合組成に配合し、混合した後、所定形状
の圧粉体にプレス成形し、この圧粉体を、酸化性雰囲気
中、１４００〜１８００℃の温度に所定時間保持の条件
で焼結し、さらに必要に応じて熱間静水圧プレス（ＨＩ
Ｐ）処理を施すことによって製造されることも知られて
いる。In addition, these conventional Al 2 O 3 —ZrO 2
System sintered La mix, as described in the Auslegeschrift, as raw material powder, Al 2 O 3 powder, ZrO 2 powder,
Using a partially stabilized ZrO 2 powder or the like, these raw material powders are blended into a predetermined compounding composition, mixed, and then pressed into a green compact having a predetermined shape. Sintering at a temperature of １1800 ° C. for a predetermined time and, if necessary, hot isostatic pressing (HI
It is also known to be manufactured by performing P) treatment.
【０００４】[0004]
【発明が解決しようとする課題】一方、近年の例えば切
削加工の省力化、ＦＡ化、および汎用化に対する要求は
厳しく、これに伴ない、連続切削および断続切削のいず
れの切削も可能な切削工具が強く望まれているが、上記
の従来Ａｌ2 Ｏ3 −ＺｒＯ2 系焼結セラミックスの場
合、これを例えば鋼の断続切削に用いると、靭性不足が
原因で切刃に欠損やチッピングが発生し易く、実用に供
することができないのが現状である。On the other hand, in recent years, for example, cutting demands for labor saving, FA, and generalization of cutting work are severe, and accordingly, a cutting tool capable of performing both continuous cutting and intermittent cutting. In the case of the above-mentioned conventional Al 2 O 3 —ZrO 2 based sintered ceramics, for example, when this is used for interrupted cutting of steel, chipping or chipping occurs on the cutting edge due to insufficient toughness. At present, it is not easy to use.
【０００５】そこで、本発明者等は、上述のような観点
から、靭性のすぐれたＡｌ2 Ｏ3 −ＺｒＯ2 系焼結セラ
ミックスを開発すべく研究を行なった結果、Ａｌ2 Ｏ3
−ＺｒＯ2 系焼結セラミックスを製造するに際して、原
料粉末として用いられるＡｌ2 Ｏ3 粉末に、あらかじめ
Ｃａ，Ｂａ、およびＳｒの炭酸塩、硝酸塩、塩化物、お
よび酸化物（以下、それぞれＣａＣＯ3 ，ＢａＣＯ3 ，
ＳｒＣＯ3 ，Ｃａ（ＮＯ3 ）2 ，Ｂａ（ＮＯ3 ）2 ，Ｓ
ｒ（ＮＯ3 ）2 ，ＣａＣｌ2，ＢａＣｌ2 ，ＳｒＣ
ｌ2 ，ＣａＯ，ＢａＯ、およびＳｒＯで示す）のうちの
１種以上の粉末と、酸化けい素（以下、ＳｉＯ2 で示
す）粉末およびＳｉアルコキシドのうちの１種以上と
を、全体に占める重量割合で（以下、％はすべて重量％
を示す）、それぞれ前者：０．０２〜２％、後者：０．
０２〜１％の割合で配合し、混合した後、酸化性雰囲気
中、６００〜１０５０℃の温度に所定時間保持の加熱処
理を施した状態で（この場合、前記炭酸塩、硝酸塩、お
よび塩化物はいずれも酸化物となるので、以下上記酸化
物を含め、これらを総称して金属酸化物系化合物とい
い、またＳｉアルコキシドはＳｉＯ2 となるので、以下
ＳｉＯ2 を含め、これらを総称してＳｉＯ2 系化合物と
いう）、これに同じく原料粉末としてのＺｒＯ2 粉末お
よび安定化ＺｒＯ2 粉末のうちのいずれか、または両方
を、同じく全体に占める割合で５〜３０％配合し、混合
し、プレス成形などにより圧粉体などの成形体とし、こ
の成形体を焼結すると、焼結時に、上記Ｃａ，Ｂａ、お
よびＳｒの酸化物とＳｉＯ2 の共存作用でＡｌ2 Ｏ3 結
晶が細長く成長し、この結果得られたＡｌ2 Ｏ3 −Ｚｒ
Ｏ2 系焼結セラミックスは、図１の走査型電子顕微鏡に
よる組織写真に例示される通り、Ａｌ2 Ｏ3 の主体が細
長成長結晶からなる組織をもつようになり、この細長成
長Ａｌ2 Ｏ3 結晶によってすぐれた靭性を具備するよう
になり、したがってこれを切削工具として用いた場合、
鋼の連続切削は勿論のこと、高靭性が要求される鋼の断
続切削にも、切刃に欠損やチッピングなどの発生がな
く、長期に亘ってすぐれた切削性能を発揮するという研
究結果を得たのである。Accordingly, the present inventors have conducted research from the above viewpoints to develop Al 2 O 3 —ZrO 2 based sintered ceramics having excellent toughness. As a result, Al 2 O 3
In producing a -ZrO 2 -based sintered ceramic, Al 2 O 3 powder used as a raw material powder is added in advance to Ca, Ba, and Sr carbonate, nitrate, chloride, and oxide (hereinafter, CaCO 3 , BaCO 3 ,
SrCO 3 , Ca (NO 3 ) 2 , Ba (NO 3 ) 2 , S
r (NO 3 ) 2 , CaCl 2 , BaCl 2 , SrC
weight of at least one of l 2 , CaO, BaO, and SrO) and at least one of silicon oxide (hereinafter, SiO 2 ) powder and Si alkoxide. In percentage (hereinafter, all% are weight%
The former: 0.02 to 2%, and the latter: 0. 2%.
After mixing and mixing at a rate of from 02 to 1%, the mixture is subjected to a heat treatment of maintaining the temperature at 600 to 1050 ° C. for a predetermined time in an oxidizing atmosphere (in this case, the carbonate, nitrate, and chloride are used). Are all oxides, so including the above oxides, these are collectively referred to as metal oxide compounds, and Si alkoxides are SiO 2 , so hereinafter, including SiO 2 , these are collectively referred to that SiO 2 compounds), or both, of the ZrO 2 powder and stabilized ZrO 2 powder as well the raw material powder to, and 5-30% in proportions also the total, mixed, pressed When a compact such as a green compact is formed by molding or the like and this compact is sintered, Al 2 O 3 crystal grows elongated by the coexistence of the oxides of Ca, Ba, and Sr and SiO 2 during sintering. ,this Results obtained Al 2 O 3 -Zr
O 2 based sintered ceramics, as illustrated in structure photograph by a scanning electron microscope of Figure 1, will have a tissue mainly composed of Al 2 O 3 is an elongated grown crystal, the elongate growing Al 2 O 3 The crystal has excellent toughness, so when it is used as a cutting tool,
We have obtained research results that show excellent cutting performance over long periods of time, not only in continuous cutting of steel but also in intermittent cutting of steel that requires high toughness, without the occurrence of chipping or chipping on the cutting edge. It was.
【０００６】この発明は、上記の研究結果にもとづいて
なされたものであって、Ａｌ2 Ｏ3と、ＺｒＯ2 および
安定化ＺｒＯ2 のいずれかまたは両方を主成分とし、さ
らにＣａの酸化物、Ｂａの酸化物およびＳｒの酸化物の
内の１種または２種以上、並びにＳｉＯ 2 を含有するＡ
ｌ2 Ｏ3 −ＺｒＯ2 系焼結セラミックスであって、上記
焼結セラミックスを構成するＡｌ2 Ｏ3 の主体を、組織
上細長成長結晶に成長させてなる靭性にすぐれたＡｌ2
Ｏ3 −ＺｒＯ2 系焼結セラミックスに特徴を有するもの
である。[0006] This invention was made based on the above findings, Al 2 O 3, as a main component one or both of ZrO 2 and stabilized ZrO 2, and
And oxides of Ca, Ba and Sr.
One or more of the above, and A containing SiO 2
A l 2 O 3 -ZrO 2 based sintered ceramic, Al 2 where the principal of Al 2 O 3 constituting the sintered ceramics, excellent in toughness comprising grown organizational elongated growing crystals
The O 3 -ZrO 2 sintered ceramics are those having the features.
【０００７】[0007]
【実施例】つぎに、この発明のＡｌ2 Ｏ3 −ＺｒＯ2 系
焼結セラミックスを実施例により具体的に説明する。原
料粉末として、いずれも０．１〜５μｍの範囲内の所定
の平均粒径を有する、各種の金属酸化物系化合物粉末、
ＳｉＯ2 粉末、Ｓｉアルコキシド、ＺｒＯ2粉末、Ｙ2
Ｏ3 またはＣｅＯ2 含有の部分安定化ＺｒＯ2 粉末、お
よびＡｌ2 Ｏ3 粉末を用意し、まず、これらの原料粉末
のうちの金属酸化物系化合物粉末とＳｉＯ2 系化合物と
を、Ａｌ2 Ｏ3 粉末に表１〜３に示される割合（全体に
占める割合で示す）で配合し、ボールミルで７２時間混
合した後、大気中、同じく表１〜３に示される条件で加
熱処理を施し、ついでこれに同じく表１〜３に示される
割合（同じく全体に占める割合）でＺｒＯ2 粉末および
部分安定化ＺｒＯ2 粉末を配合し、ボールミルで７２時
間湿式混合し、上記Ｓｉアルコキシドを用いた場合には
水を添加して加水分解を行なわしめ、乾燥した後、１to
n ／cm2 の圧力で所定形状の圧粉体にプレス成形し、こ
の圧粉体を大気中、表１〜３に示される温度に１時間保
持の条件で焼結することにより、ＪＩＳ・ＳＮＧＮ１２
０４０８のスローアウェイ形状をもった本発明Ａｌ2 Ｏ
3 −ＺｒＯ2 系焼結セラミックスで構成された切削工具
（以下、本発明セラミックス切削工具という）１〜２３
を製造した。また、靭性を評価する目的で、曲げ強度お
よび破壊靭性値の測定用試験片も合せて製造した。EXAMPLES Next, specifically described Al 2 O 3 -ZrO 2 sintered ceramics of the invention by way of examples. Various metal oxide-based compound powders each having a predetermined average particle size in the range of 0.1 to 5 μm as raw material powders,
SiO 2 powder, Si alkoxide, ZrO 2 powder, Y 2
A partially stabilized ZrO 2 powder containing O 3 or CeO 2 and an Al 2 O 3 powder are prepared. First, of these raw material powders, a metal oxide compound powder and a SiO 2 compound are converted into Al 2 O 3 The powder was blended at the ratio shown in Tables 1 to 3 (indicated by the ratio to the whole), and mixed by a ball mill for 72 hours, and then subjected to heat treatment in the air under the same conditions as shown in Tables 1 to 3. The ZrO 2 powder and the partially stabilized ZrO 2 powder were blended in the same proportions as shown in Tables 1 to 3 (also in the whole) and wet-mixed in a ball mill for 72 hours to use the Si alkoxide. After adding water to carry out hydrolysis and drying,
By pressing into a green compact having a predetermined shape at a pressure of n / cm 2 , and sintering the green compact in the atmosphere at a temperature shown in Tables 1 to 3 for 1 hour, JIS SNGN12
Al 2 O of the present invention having a throwaway shape of 0408
Cutting tools made of 3- ZrO 2 -based sintered ceramics (hereinafter referred to as ceramic cutting tools of the present invention) 1 to 23
Was manufactured. Further, for the purpose of evaluating toughness, a test piece for measuring bending strength and fracture toughness value was also manufactured.
【０００８】さらに、比較の目的で、原料粉末として、
上記のＡｌ2 Ｏ3 粉末、ＺｒＯ2 粉末、および安定化Ｚ
ｒＯ2 粉末を用い、加熱処理を行なわず、これらの原料
粉末を直接表３に示される配合組成に配合し、かつ表３
に示される温度で焼結する以外は同一の条件にて従来Ａ
ｌ2 Ｏ3 −ＺｒＯ2 系焼結セラミックスで構成された切
削工具（以下、従来セラミックス切削工具という）１〜
４を製造した。この場合も曲げ強度および破壊靭性値測
定用試験片を製造した。Further, for the purpose of comparison, as a raw material powder,
The above Al 2 O 3 powder, ZrO 2 powder, and stabilized Z
These raw material powders were directly blended into the composition shown in Table 3 using rO 2 powder without heat treatment.
Under the same conditions except for sintering at the temperature shown in
Cutting tool made of l 2 O 3 -ZrO 2 sintered ceramics (hereinafter referred to as conventional ceramic cutting tool)
4 was produced. Also in this case, a test piece for measuring a bending strength and a fracture toughness value was manufactured.
【０００９】[0009]
【表１】 [Table 1]
【００１０】[0010]
【表２】 [Table 2]
【００１１】[0011]
【表３】 [Table 3]
【００１２】[0012]
【表４】 [Table 4]
【００１３】[0013]
【表５】 [Table 5]
【００１４】ついで、この結果得られた各種のセラミッ
クス切削工具について、 被削材：ＳＣＭ４４０（硬さ：ＨR Ｂ１８０）、の２本
縦溝付丸棒、 切削速度：４００ｍ／min.、 切込み：０．１５mm、 送り：１mm／rev.、 切削時間：１５分、 の条件での鋼の湿式断続切削試験、並びに、 被削材：ＳＣＭ４４０ 切削速度：３００ｍ／min.、 切込み：１．５mm、 送り：０．２mm／rev.、 切削時間：１０分、 の条件での鋼の湿式連続切削試験を行ない、いずれの切
削試験でも切刃の逃げ面摩耗幅を測定した。これらの測
定結果を表４，５に示した。なお、表４，５には曲げ強
度および破壊靭性値の測定結果も合せて示した。[0014] Next, the results obtained various ceramic cutting tool, workpiece: SCM440 (hardness: H R B180), 2 present longitudinal grooved round bar of, cutting speed:. 400 meters / min, Depth of cut: 0.15 mm, feed: 1 mm / rev., Cutting time: 15 minutes, wet intermittent cutting test of steel, and work material: SCM440 cutting speed: 300 m / min., Cutting depth: 1.5 mm, feed : 0.2 mm / rev., Cutting time: 10 minutes. A wet continuous cutting test of steel was performed under the following conditions, and the flank wear width of the cutting edge was measured in each cutting test. Tables 4 and 5 show the measurement results. Tables 4 and 5 also show the measurement results of bending strength and fracture toughness.
【００１５】さらに、図１および図２には、それぞれ本
発明セラミックス切削工具３および従来セラミックス切
削工具４の走査型電子顕微鏡による組織写真（５０００
倍）を示した。加えて、図３にも本発明セラミックス切
削工具５の走査型電子顕微鏡による組織写真（５０００
倍）を示したが、図示される通り縦長成長Ａｌ 2 Ｏ 3 結
晶がＺｒＯ 2 結晶の一部を巻き込みながら成長するこ
と、すなわち前記縦長成長Ａｌ 2 Ｏ 3 結晶粒内にＺｒＯ
2 結晶粒が分布する状態が示されている。 1 and 2 are micrographs (5000) of a ceramic cutting tool 3 of the present invention and a conventional ceramic cutting tool 4 by a scanning electron microscope, respectively.
Times). In addition, FIG.
Structure photograph of the cutting tool 5 with a scanning electron microscope (5000)
Showed times) but, as is illustrated Vertical growth Al 2 O 3 sintered
The crystal grows while entraining a part of the ZrO 2 crystal.
That is, ZrO is contained in the vertically grown Al 2 O 3 crystal grains.
The state where two crystal grains are distributed is shown.
【００１６】[0016]
【発明の効果】図１および図２、並びに図３に示される
通り、本発明セラミックス切削工具が細長成長Ａｌ2 Ｏ
3 結晶と塊状ＺｒＯ2 結晶を主体とした混合組織を示す
のに対し、従来セラミックス切削工具は塊状Ａｌ2 Ｏ3
結晶と塊状ＺｒＯ2 結晶の混合組織を示し、両者は組織
上相異することが明白であり、これらの組織上の相異は
靭性に現われ、表４，５に示される通り本発明セラミッ
クス切削工具１〜２３は、従来セラミックス切削工具１
〜４に比して一段とすぐれた靭性をもつことが示されて
おり、このことは、鋼の連続切削では同等の切削性能を
示すものの、鋼の断続切削では、従来セラミックス切削
工具１〜４のいずれもが切刃に欠損が発生し、比較的短
時間で使用寿命に至るのに対して、本発明セラミックス
切削工具１〜２３は、いずれも切刃に欠損やチッピング
の発生なく、すぐれた耐摩耗性を長期に亘って発揮する
ことからも明らかである。As shown in FIGS. 1 and 2 and FIG . 3 , the ceramic cutting tool of the present invention has an elongated growth of Al 2 O.
While a mixed structure mainly composed of three crystals and bulk ZrO 2 crystal is shown, the conventional ceramic cutting tool has a bulk Al 2 O 3 crystal.
It shows a mixed structure of the crystal and the bulk ZrO 2 crystal, and it is clear that both are structurally different. These structural differences appear in toughness, and as shown in Tables 4 and 5, the ceramic cutting tool of the present invention 1 to 23 are conventional ceramic cutting tools 1
It has been shown that it has a much higher toughness than that of the conventional ceramic cutting tools 1-4, although it shows the same cutting performance in continuous cutting of steel, but in intermittent cutting of steel. In each case, the cutting edge is chipped, and the working life is reached in a relatively short time. On the other hand, the ceramic cutting tools 1 to 23 of the present invention have excellent cutting resistance without chipping or chipping. It is clear from the fact that the abrasion is exhibited over a long period of time.
【００１７】上述のように、この発明のＡｌ2 Ｏ3 −Ｚ
ｒＯ2 系焼結セラミックスは、従来Ａｌ2 Ｏ3 −ＺｒＯ
2 系焼結セラミックスに比して一段とすぐれた靭性をも
つので、例えばこれを切削工具として用いた場合、鋼の
連続切削は勿論のこと、高靭性が要求される鋼の断続切
削などに用いても切刃に欠損やチッピングなどの発生な
く、すぐれた切削性能を長期に亘って発揮するのであ
る。As described above, the Al 2 O 3 -Z of the present invention
rO 2 -based sintered ceramics are conventionally known as Al 2 O 3 —ZrO
Since it has a higher level of toughness compared to 2 series sintered ceramics, for example, when this is used as a cutting tool, it is used not only for continuous cutting of steel, but also for intermittent cutting of steel where high toughness is required Even without cutting or chipping of the cutting edge, excellent cutting performance is exhibited over a long period of time.
【図１】本発明セラミックス切削工具３の走査型電子顕
微鏡による組織写真である。FIG. 1 is a micrograph of a ceramic cutting tool 3 of the present invention, taken by a scanning electron microscope.
【図２】従来セラミックス切削工具４の走査型電子顕微
鏡による組織写真である。FIG. 2 is a micrograph of a conventional ceramic cutting tool 4 taken with a scanning electron microscope.
【図３】本発明セラミックス切削工具５の走査型電子顕
微鏡による組織写真である。FIG. 3 is a micrograph of a ceramic cutting tool 5 of the present invention, taken with a scanning electron microscope.
フロントページの続き (56)参考文献 特開 昭63−139044（ＪＰ，Ａ) 特開 平３−242370（ＪＰ，Ａ) 特開 平３−137053（ＪＰ，Ａ) 特開 平５−17210（ＪＰ，Ａ)Continuation of the front page (56) References JP-A-63-139044 (JP, A) JP-A-3-242370 (JP, A) JP-A-3-137053 (JP, A) JP-A-5-17210 (JP) , A)
Claims (2)
および部分安定化酸化ジルコニウムのいずれかまたは両
方を主成分とし、さらにＣａの酸化物、Ｂａの酸化物お
よびＳｒの酸化物の内の１種または２種以上、並びに酸
化ケイ素を含有する酸化アルミニウム−酸化ジルコニウ
ム系焼結セラミックスであって、上記焼結セラミックス
を構成する酸化アルミニウムの主体を、組織上細長成長
結晶に成長させてなることを特徴とする靭性のすぐれた
酸化アルミニウム−酸化ジルコニウム系焼結セラミック
ス。1. An aluminum oxide, one or both of zirconium oxide and partially stabilized zirconium oxide as a main component, and further, an oxide of Ca, an oxide of Ba, and the like.
One or more of oxides of Sr and Sr, and an acid
An aluminum oxide-zirconium oxide-based sintered ceramic containing silicon oxide, which has excellent toughness, characterized in that a main body of aluminum oxide constituting the sintered ceramic is grown into an elongated crystal on the structure. Aluminum oxide-zirconium oxide sintered ceramics.
コニウムおよび部分安定化酸化ジルコニウムの含有量が
５〜３０重量％であり、Ｃａの酸化物、Ｂａの酸化物お
よびＳｒの酸化物の内の１種または２種以上の含有量が
０．０２〜２重量％であり、酸化ケイ素の含有量が０．
０２〜１重量％であることを特徴とする上記請求項１記
載の酸化アルミニウム−酸化ジルコニウム系焼結セラミ
ックス。2. The sintered ceramic according to claim 1, wherein the content of zirconium oxide and partially stabilized zirconium oxide is 5 to 30% by weight, and the oxide of Ca, the oxide of Ba and the oxide of Ba are used.
Content of one or more of the oxides of Sr and Sr
0.02 to 2% by weight, and the content of silicon oxide is 0.1%.
The aluminum oxide-zirconium oxide-based sintered ceramic according to claim 1, wherein the content is from 02 to 1% by weight .
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4129973A JP2910020B2 (en) | 1992-04-23 | 1992-04-23 | Aluminum oxide-zirconium oxide sintered ceramics with excellent toughness |
| US08/049,204 US5403795A (en) | 1992-04-23 | 1993-04-19 | Platelet α-Al2 O3 based ceramic composite |
| DE4313358A DE4313358A1 (en) | 1992-04-23 | 1993-04-23 | Ceramic based on alpha-aluminium oxide in platelet form - obtd. by adding agents controlling the formation and grain growth of the platelets to the oxide |
| US08/285,193 US5686366A (en) | 1992-04-23 | 1994-08-03 | Process for producing platelet α-Al2 O3 based ceramic composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4129973A JP2910020B2 (en) | 1992-04-23 | 1992-04-23 | Aluminum oxide-zirconium oxide sintered ceramics with excellent toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05294718A JPH05294718A (en) | 1993-11-09 |
| JP2910020B2 true JP2910020B2 (en) | 1999-06-23 |
Family
ID=15023020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4129973A Expired - Lifetime JP2910020B2 (en) | 1992-04-23 | 1992-04-23 | Aluminum oxide-zirconium oxide sintered ceramics with excellent toughness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2910020B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3082434B2 (en) | 1992-04-27 | 2000-08-28 | 三菱マテリアル株式会社 | Manufacturing method of aluminum oxide based ceramic cutting tool with excellent toughness |
| JP3082432B2 (en) | 1992-04-27 | 2000-08-28 | 三菱マテリアル株式会社 | Manufacturing method of aluminum oxide based ceramic cutting tool with excellent toughness |
| JP3082433B2 (en) | 1992-04-27 | 2000-08-28 | 三菱マテリアル株式会社 | Manufacturing method of aluminum oxide based ceramic cutting tool with excellent toughness |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7148167B2 (en) | 2003-08-28 | 2006-12-12 | Kyocera Corporation | Alumina/zirconia ceramics and method of producing the same |
| WO2005042047A1 (en) * | 2003-10-30 | 2005-05-12 | Kyocera Corporation | Biological member and method for manufacture thereof |
| JP4753575B2 (en) * | 2003-12-25 | 2011-08-24 | 京セラ株式会社 | Biomaterial, artificial joint using the same, and method for producing biomaterial |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0811707B2 (en) * | 1986-12-01 | 1996-02-07 | 東ソー株式会社 | Alumina-zirconia sintered body and method for producing the same |
| JPH0517210A (en) * | 1991-02-07 | 1993-01-26 | Sumitomo Cement Co Ltd | Production of alumina-based composite sintered body and the sintered body |
-
1992
- 1992-04-23 JP JP4129973A patent/JP2910020B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3082434B2 (en) | 1992-04-27 | 2000-08-28 | 三菱マテリアル株式会社 | Manufacturing method of aluminum oxide based ceramic cutting tool with excellent toughness |
| JP3082432B2 (en) | 1992-04-27 | 2000-08-28 | 三菱マテリアル株式会社 | Manufacturing method of aluminum oxide based ceramic cutting tool with excellent toughness |
| JP3082433B2 (en) | 1992-04-27 | 2000-08-28 | 三菱マテリアル株式会社 | Manufacturing method of aluminum oxide based ceramic cutting tool with excellent toughness |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05294718A (en) | 1993-11-09 |
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