CN108546129A - A kind of preparation method of High-Purity Molybdenum aluminium boron ceramic material - Google Patents
A kind of preparation method of High-Purity Molybdenum aluminium boron ceramic material Download PDFInfo
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Abstract
The invention discloses a kind of preparation methods of High-Purity Molybdenum aluminium boron ceramic material, and the element powder of Mo, Al and B are mixed, the high-purity MoAlB ceramic block materials being prepared by discharge plasma sintering.Material prepared by the present invention has the characteristics that purity is high, electrical and thermal conductivity is good, high temperature resistant, and preparation process is simple, controllability is good.The material can be applied as high-temperature-resistant structure part and coating under high temperature environment.
Description
Technical field
The present invention relates to a kind of preparation methods of High-Purity Molybdenum aluminium boron ceramic material, belong to technical field of ceramic material.
Background technology
MoAlB ceramics are a kind of novel structural ceramics for having nanometer laminated structure and can be machined.It is by MoB
Atomic layer and Al atomic layers are alternately arranged, and special atomic structure makes MoAlB ceramics have many good characteristics,
Its heat conductivility is similar to metal, and coefficient of thermal expansion is suitable with many engineering alloys, but its antioxygenic property can be with ceramics
It compares favourably, is expected to be used for high-temperature structural material field as high-temperature-resistant structure part and coating.Although MoAlB ceramics have many
Excellent specific property, but be also rarely reported about the synthesis of the material at present, and synthesis purity is more difficult to control, therefore, MoAlB ceramics
Research and application are very limited.Such as document（Scientific Reports, 6, No. 26475, 2016）Described in,
Using MoB and Al powder as original material, progress 5 ~ 6 h of hot pressed sintering has obtained MoAlB at 1200 oC and 39 MPa pressure
Ceramics.But soaking time is longer needed for above-mentioned preparation method, and has Al in generation product3The impurity phases such as Mo generate, and make pottery to MoAlB
The performance of porcelain has very detrimental effect.In addition to the above methods, the preparation method about high-purity MoAlB ceramic blocks is not more
Report.
Invention content
The purpose of the present invention is to provide it is a kind of it is simple for process, inexpensive, yield is high, be suitble to industrialized production High-Purity Molybdenum
The preparation method of aluminium boron ceramic material.
A kind of preparation method of High-Purity Molybdenum aluminium boron ceramic material, it is characterised in that the ceramic material is by mixing element powder
Object carries out discharge plasma sintering and is prepared, and is as follows：
1）Dispensing：By Mo, Al and B element powder according to molar ratio 0.9 ~ 1:1~1.2:0.9 ~ 1 proportioning carries out dispensing；
2）Batch mixing：It weighs Mo, Al and B element powder respectively according to aforementioned proportion, is put into tungsten-carbide ball grinding jar, passes through high-energy ball milling
Mixed-powder is obtained, mixed-powder, which is then packed into mold, carries out precompressed；
3）Sintering：The mixed-powder of above-mentioned precompressed is placed in graphite jig and carries out discharge plasma sintering, the sintering ginseng of use
Number is：Vacuum degree is 10-1~ 1 Pa, heating rate are 50 ~ 150 oC/min, and sintering temperature is 1250 ~ 1350 oC, pressure 30
~ 40 MPa, 5 ~ 10 min of soaking time cool to room temperature with the furnace after the completion of sintering.
The design parameter of the batch mixing is：Ratio of grinding media to material is 2 ~ 4:1, rotating speed is 200 ~ 400 r/min, and Ball-milling Time is 8 ~ 12
H, ball milling are filled with argon gas before starting in tungsten-carbide ball grinding jar.
The present invention is had the following advantages using MoAlB ceramic block materials prepared by above-mentioned material composition and technological parameter：
One of features of the present invention is：Used original material is relatively inexpensive, cost-effective.
The features of the present invention second is that：Obtained MoAlB ceramic block material purity is very high, without other impurity interpromoting relations in five elements
At.
The three of the features of the present invention are：The sintering velocity of the technique is fast, and soaking time is short, and production efficiency is high, is conducive to advise
Mould produces.
Description of the drawings
Fig. 1 is the X ray diffracting spectrum of the MoAlB ceramic block materials synthesized with the method for the present invention.
Specific implementation mode
Embodiment 1：
It is Mo according to molar ratio:Al:B=1:1:0.9 carries out dispensing, weighs the mixed powder of Mo, Al and B totally 200 g；Then will
Mixed powder is placed in high energy ball mill, is filled with argon gas, ratio of grinding media to material 4:1,8 h of ball milling is obtained under 200 r/min speed conditions
To mixed-powder, then mixed-powder is fitted into graphite jig, is placed in discharge plasma sintering stove and is sintered.It is specific to burn
Junction parameter is：Dynamic vacuum degree is 10-1~ 1 Pa, heating rate be 50 oC/min, 1350 oC of sintering temperature, 30 MPa of pressure,
5 min of soaking time.After sintering, will be sintered block carry out surface polishing, polishing processing to get to the present invention it is high-purity
MoAlB ceramic block materials.
Embodiment 2：
It is Mo according to molar ratio:Al:B=1:1.2:1 carries out dispensing, weighs the mixed powder of Mo, Al and B totally 200 g；Then will
Mixed powder is placed in high energy ball mill, is filled with argon gas, ratio of grinding media to material 3:1,10 h of ball milling is obtained under 300 r/min speed conditions
To mixed-powder, then mixed-powder is fitted into graphite jig, is placed in discharge plasma sintering stove and is sintered.It is specific to burn
Junction parameter is：Dynamic vacuum degree is 10-1~ 1 Pa, heating rate are 100 oC/min, 1300 oC of sintering temperature, pressure 35
MPa, 8 min of soaking time.After sintering, will be sintered block carry out surface polishing, polishing processing to get to the present invention height
Pure MoAlB ceramic block materials.
Embodiment 3：
It is Mo according to molar ratio:Al:B=0.9:1.1:1 carries out dispensing, weighs the mixed powder of Mo, Al and B totally 200 g；Then
Mixed powder is placed in high energy ball mill, argon gas, ratio of grinding media to material 2 are filled with:1,12 h of ball milling under 400 r/min speed conditions
Mixed-powder is obtained, then mixed-powder is fitted into graphite jig, is placed in discharge plasma sintering stove and is sintered.Specifically
Sintering parameter is：Dynamic vacuum degree is 10-1~ 1 Pa, heating rate are 150 oC/min, 1250 oC of sintering temperature, pressure 40
MPa, 10 min of soaking time.After sintering, block will be sintered and carry out surface polishing, polishing processing to get to the present invention's
High-purity MoAlB ceramic block materials.
Claims (2)
1. a kind of preparation method of High-Purity Molybdenum aluminium boron ceramic material, it is characterised in that the ceramic material is by by element powder mixture
It carries out discharge plasma sintering to be prepared, be as follows：
1）Dispensing：By Mo, Al and B element powder according to molar ratio 0.9 ~ 1:1~1.2:0.9 ~ 1 proportioning carries out dispensing；
2）Batch mixing：It weighs Mo, Al and B element powder respectively according to aforementioned proportion, is put into tungsten-carbide ball grinding jar, passes through high-energy ball milling
Method obtains mixed-powder, and mixed-powder, which is then packed into mold, carries out precompressed；
3）Sintering：The mixed-powder of above-mentioned precompressed is placed in graphite jig and carries out discharge plasma sintering, the sintering ginseng of use
Number is：Vacuum degree is 10-1~ 1 Pa, heating rate are 50 ~ 150 oC/min, and sintering temperature is 1250 ~ 1350 oC, pressure 30
~ 40 MPa, 5 ~ 10 min of soaking time cool to room temperature with the furnace after the completion of sintering.
2. preparation method as described in claim 1, it is characterised in that the design parameter of the batch mixing is：Ratio of grinding media to material is 2 ~ 4:1,
Rotating speed is 200 ~ 400 r/min, and Ball-milling Time is 8 ~ 12 h, and ball milling is filled with argon gas before starting in tungsten-carbide ball grinding jar.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111116206A (en) * | 2019-12-17 | 2020-05-08 | 中铭瓷(苏州)纳米粉体技术有限公司 | Preparation method of compact MoAlB ceramic material, product thereof and preparation method of high-purity MoAlB ceramic powder |
| CN112342427A (en) * | 2020-11-05 | 2021-02-09 | 河南科技大学 | Molybdenum-aluminum-boron ceramic particle reinforced copper-based composite material, preparation method thereof and pantograph slide plate |
| CN113213940A (en) * | 2021-05-11 | 2021-08-06 | 河南科技大学 | Mo2BC ceramic material and preparation method thereof |
| CN114276146A (en) * | 2021-11-11 | 2022-04-05 | 复旦大学 | High-purity compact WAlB MAB phase ceramic block material and preparation method thereof |
| CN114457303A (en) * | 2021-07-27 | 2022-05-10 | 福建恒而达新材料股份有限公司 | Carbon steel thermal barrier ceramic coating and preparation method thereof |
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| CN107512912A (en) * | 2017-09-08 | 2017-12-26 | 北京交通大学 | The preparation method of high-purity MoAlB ceramic powders and compact block |
| CN107602132A (en) * | 2017-07-25 | 2018-01-19 | 西南交通大学 | A kind of preparation method of MoAlB ceramic powders |
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2018
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| JPH0671406A (en) * | 1992-07-08 | 1994-03-15 | Asahi Glass Co Ltd | Injection sleeve for die casting and method for casting aluminum or aluminum alloy member |
| CN104498755A (en) * | 2014-12-30 | 2015-04-08 | 中南大学 | Method for preparing ultra-fine grain high-thermal stability boron carbide ceramic material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111116206A (en) * | 2019-12-17 | 2020-05-08 | 中铭瓷(苏州)纳米粉体技术有限公司 | Preparation method of compact MoAlB ceramic material, product thereof and preparation method of high-purity MoAlB ceramic powder |
| CN112342427A (en) * | 2020-11-05 | 2021-02-09 | 河南科技大学 | Molybdenum-aluminum-boron ceramic particle reinforced copper-based composite material, preparation method thereof and pantograph slide plate |
| CN113213940A (en) * | 2021-05-11 | 2021-08-06 | 河南科技大学 | Mo2BC ceramic material and preparation method thereof |
| CN114457303A (en) * | 2021-07-27 | 2022-05-10 | 福建恒而达新材料股份有限公司 | Carbon steel thermal barrier ceramic coating and preparation method thereof |
| CN114457303B (en) * | 2021-07-27 | 2024-03-29 | 福建恒而达新材料股份有限公司 | Carbon steel thermal barrier ceramic coating and preparation method thereof |
| CN114276146A (en) * | 2021-11-11 | 2022-04-05 | 复旦大学 | High-purity compact WAlB MAB phase ceramic block material and preparation method thereof |
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Application publication date: 20180918 |