CN100460111C - High strength molybdenum siicide composite material and its preparation method - Google Patents
High strength molybdenum siicide composite material and its preparation method Download PDFInfo
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- CN100460111C CN100460111C CNB2007100632406A CN200710063240A CN100460111C CN 100460111 C CN100460111 C CN 100460111C CN B2007100632406 A CNB2007100632406 A CN B2007100632406A CN 200710063240 A CN200710063240 A CN 200710063240A CN 100460111 C CN100460111 C CN 100460111C
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- molybdenum
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- siicide
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Abstract
The present invention relates to a molybdenum disilicide composie material with high strength and its preparation method. The matrix of said molybdenum disilicide composite material is Mo (Si1-x Alx)2, in which X is in the range of 0.025-0.300. Said invention is a composite material prepared by using 80-95 wt% of Mo(Si1-x Alx)2 and 5-20 wt% of montmorillonite. The invented material has high bending strength, fracture toughness and compressive strength.
Description
Technical field
The invention belongs to technical field of inorganic material, a kind of high strength molybdenum siicide composite material and preparation method thereof particularly is provided.Specifically be a kind of Mo of including (Si
1-xAl
x)
2The composite that is prepared into the mixture of montmorillonite.
Background technology
At MoSi
2In the crystal structure, the Si-Si atom is formed the covalent bond chain, and the Mo-Mo atom belongs to the metallic bond combination, and the Mo-Si atom is mediate, so MoSi
2Feature with the coexistence of metallic bond and covalent bond.The molybdenum disilicide material can be prepared into exothermic material, coating material, electrode material, and molybdenum disilicide still is a kind of very promising high-temperature structural material.
But toughness that there is room temperature in molybdenum disilicide is low, elevated temperature strength is low, sintering temperature height, the shortcoming that the cost of raw material is high.These shortcomings have all limited the application of molybdenum disilicide.
Chinese patent CN1583669A has announced a kind of method for preparing molybdenum disilicide/Al 2 O 3 composition, adopts heat pressing process, and the fracture toughness of gained composite is up to 3.9MPa.m
1/2Chinese patent CN1560302A has announced a kind of quick preparation MoSi
2The method of based composites, its sintering temperature reach 1400～1600 degree.Chinese patent CN1391539A has announced a kind of high-intensity molybden silicide material that has, and the wild phase of its interpolation is ZrO
2Chinese patent CN1642875A has announced the manufacture method of heating element of molybdenum silicide type, forms compound Mo (Si
1-xAl
x)
2And Al
2O
3, wherein X is within 0.4～0.6 the scope, and Al content is higher.Summer E etc. has prepared a kind of Mo-Si-B inter-metallic compound material, adopts paraffinic base binding agent (Summer E, et al, Intermetallics, 2000,8:1169-1174) in preparation process.
Summary of the invention
The object of the present invention is to provide a kind of high strength molybdenum siicide composite material and preparation method thereof, realized than single MoSi
2Superior performance, the molybdenum disilicide composite that room temperature bending strength, fracture toughness and compressive strength are high.
The matrix of molybdenum disilicide composite of the present invention is Mo (Si
1-xAl
x)
2, wherein X is within 0.025～0.300 the scope; Be a kind of 80～95wt%Mo (Si that includes
1-xAl
x)
2The composite that is prepared into 5～20wt% montmorillonite.
Preparation technology of the present invention is:
1, the preparation of raw material
A, with purity greater than 98% aluminium powder, purity greater than 98% molybdenum powder, purity greater than 98% silica flour, molar ratio according to 1.675mol%～20.1mol% aluminium, 33mol% molybdenum, 46.9mol%～65.325mol% silicon mixes, and adopts the synthetic technology of self-propagating reaction to obtain Mo (Si
1-xAl
x)
2, wherein X is within 0.025～0.300 the scope.
B, with gained Mo (Si
1-xAl
x)
2According to 80～95wt%Mo (Si
1-xAl
x)
2Part by weight batching with 5～20wt% montmorillonite powder; Add 6～13 weight % distilled water again; Mix; Form pug.
2, the preparation of molybdenum disilicide composite
A, the gained pug is changed in the double helix extruder, extrude the bar of 3～18 millimeters of diameters.
B, the bar after will extruding are dry under 20～80 degree constant temperature, and the moisture in the bar is reduced to below 0.3%.
C, with dried bar 1200～1500 the degree under sintering, temperature retention time is 1～3 hour, sintering atmosphere is a protective atmosphere, obtains high strength molybdenum siicide composite material.
Compared with the prior art, the present invention has following advantage:
Mo (Si in a, the material of the present invention
1-xAl
x)
2The effectively intensity of reinforcing material and toughness.
Montmorillonite plays the effect of activated sintering in b, the material of the present invention, has reduced MoSi
2Sintering temperature.
The specific embodiment
Example 1:
1, raw material is prepared
A, be that 98% aluminium powder, purity are that 98% molybdenum powder, purity are 98% silica flour, mix, adopt the synthetic technology of self-propagating reaction to obtain Mo (Si according to the molar ratio of 1.675mol% aluminium, 33mol% molybdenum, 65.325mol% silicon with purity
0.975Al
0.025)
2
B, according to 95wt%Mo (Si
0.975Al
0.025)
2Part by weight batching with 5wt% montmorillonite powder; Add 6wt% distilled water again; Mix; Form pug.
2, the preparation of molybdenum disilicide composite
A, the gained pug is changed in the double helix extruder, extrude the bar of diameter 3 and 6 millimeters.
B, the bar after will extruding are dry under 50 degree constant temperature, make the moisture in the bar be reduced to 0.3%.
C, with dried bar 1500 the degree under sintering, temperature retention time is 1 hour, sintering atmosphere is an ammonia dissolving atmosphere, obtains high strength molybdenum siicide composite material.
The bending strength of gained molybdenum disilicide composite is that 420MPa, fracture toughness are 3.98MPam
1/2, compressive strength is 1740MPa.
Example 2:
1, raw material is prepared
A, be that 98% aluminium powder, purity are that 98% molybdenum powder, purity are 98% silica flour, mix, adopt the synthetic technology of self-propagating reaction to obtain Mo (Si according to the molar ratio of 20.1mol% aluminium, 33mol% molybdenum, 46.9mol% silicon with purity
0.7Al
0.3)
2
B, according to 80wt%Mo (Si
0.7Al
0.3)
2Part by weight batching with 20wt% montmorillonite powder; Add 12wt% distilled water again; Mix; Form pug.
2, the preparation of molybdenum disilicide composite
A, the gained pug is changed in the double helix extruder, extrude the bar of diameter 6 and 12 millimeters.
B, the bar after will extruding are dry under 80 degree constant temperature, make the moisture in the bar be reduced to 0.3%.
C, with dried bar 1200 the degree under sintering, temperature retention time is 3 hours, sintering atmosphere is a hydrogen, obtains high strength molybdenum siicide composite material.
The bending strength of gained molybdenum disilicide composite is that 430MPa, fracture toughness are 3.95MPam
1/2, compressive strength is 1650MPa.
Example 3:
1, raw material is prepared
A, be that 99% aluminium powder, purity are that 99% molybdenum powder, purity are 98% silica flour, mix, adopt the synthetic technology of self-propagating reaction to obtain Mo (Si according to the molar ratio of 6.7mol% aluminium, 33mol% molybdenum, 60.3mol% silicon with purity
0.9Al
0.1)
2
B, according to 91wt%Mo (Si
0.9Al
0.1)
2Part by weight batching with 9wt% montmorillonite powder; Add 10wt% distilled water again; Mix; Form pug.
2, the preparation of molybdenum disilicide composite
A, the gained pug is changed in the double helix extruder, extrude the bar of diameter 9 and 18 millimeters.
B, the bar after will extruding are dry under 70 degree constant temperature, make the moisture in the bar be reduced to 0.3%.
C, with dried bar 1460 the degree under sintering, temperature retention time is 3 hours, sintering atmosphere is an ammonia dissolving atmosphere, obtains high strength molybdenum siicide composite material.
The bending strength of gained molybdenum disilicide composite is that 500MPa, fracture toughness are 4.10MPam
1/2, compressive strength is 2010MPa.
Claims (2)
1. high strength molybdenum siicide composite material, it is characterized in that: the matrix of molybdenum disilicide composite is Mo (Si
1-xAl
x)
2, wherein X is within 0.025～0.100 the scope; Include 80～95 weight %Mo (Si
1-xAl
x)
2The composite that is prepared into the montmorillonite of 5～20 weight %.
2. the preparation method of a high strength molybdenum siicide composite material is characterized in that:
(1) preparation of raw material
A, with purity greater than 98% aluminium powder, purity greater than 98% molybdenum powder, purity greater than 98% silica flour, molar ratio according to 1.675mol%～20.1mol% aluminium, 33mol% molybdenum, 46.9mol%～65.325mol% silicon mixes, and adopts the synthetic technology of self-propagating reaction to obtain Mo (Si
1-xAl
x)
2, wherein X is within 0.025～0.300 the scope;
B, with a step gained Mo (Si
1-xAl
x)
2, according to 80～95wt%Mo (Si
1-xAl
x)
2Part by weight batching with 5～20wt% montmorillonite powder; Add 6～13 weight % distilled water again; Mix; Form pug;
(2) preparation of molybdenum disilicide composite
C, b step gained pug is changed in the double helix extruder, extrude the bar of 3～18 millimeters of diameters;
D, the bar after will extruding are dry under 20～80 degree constant temperature, and the moisture in the bar is reduced to below 0.3%;
E, with dried bar 1200～1500 the degree under sintering, temperature retention time is 1～3 hour, sintering atmosphere is a protective atmosphere, obtains high strength molybdenum siicide composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632406A CN100460111C (en) | 2007-01-04 | 2007-01-04 | High strength molybdenum siicide composite material and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100632406A CN100460111C (en) | 2007-01-04 | 2007-01-04 | High strength molybdenum siicide composite material and its preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN100999023A CN100999023A (en) | 2007-07-18 |
| CN100460111C true CN100460111C (en) | 2009-02-11 |
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ID=38257891
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|---|---|---|---|
| CNB2007100632406A Expired - Fee Related CN100460111C (en) | 2007-01-04 | 2007-01-04 | High strength molybdenum siicide composite material and its preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231058A (en) * | 2013-05-13 | 2013-08-07 | 中原工学院 | Preparation method of high temperature silicon molybdenum rods |
| RU2818057C1 (en) * | 2023-07-11 | 2024-04-23 | Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт химии силикатов им. И.В. Гребенщикова Российской академии наук (ИХС РАН) | Charge for producing composite material based on molybdenum disilicide |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3092938C (en) * | 2018-03-18 | 2021-05-04 | Sandvik Intellectual Property Ab | A heating element |
| CN109608202A (en) * | 2018-12-04 | 2019-04-12 | 合肥睿涌陶瓷材料科技有限公司 | A kind of flame-spraying molybdenum disilicide composite ceramics stick and preparation method thereof |
| CN115125437A (en) * | 2022-06-13 | 2022-09-30 | 天津荣程联合钢铁集团有限公司 | Steel for ultrahigh-strength smooth-surface prestressed steel strand and preparation method thereof |
| CN115141021B (en) * | 2022-08-31 | 2023-01-03 | 钢研昊普科技有限公司 | Modified molybdenum disilicide material and preparation method thereof |
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|---|---|---|---|---|
| CN1130688A (en) * | 1994-10-17 | 1996-09-11 | Abb管理有限公司 | Alloy containing silicide, based on at least one kind of Cr and Mo |
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| JP2006183151A (en) * | 2006-01-12 | 2006-07-13 | Toshiba Corp | Method for producing magnetic material powder and method for producing bond magnet |
-
2007
- 2007-01-04 CN CNB2007100632406A patent/CN100460111C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130688A (en) * | 1994-10-17 | 1996-09-11 | Abb管理有限公司 | Alloy containing silicide, based on at least one kind of Cr and Mo |
| CN1274681A (en) * | 1999-05-20 | 2000-11-29 | 烟台高技术产业总公司 | Molybdenum disilicide preparing process and equipment |
| CN1350598A (en) * | 1999-05-20 | 2002-05-22 | 桑德维克公司 | Resistance-heating element |
| CN1642873A (en) * | 2002-04-05 | 2005-07-20 | 桑德维克公司 | Method of making a heating element of molybdenum silicide type and a heating element |
| JP2006183151A (en) * | 2006-01-12 | 2006-07-13 | Toshiba Corp | Method for producing magnetic material powder and method for producing bond magnet |
Non-Patent Citations (4)
| Title |
|---|
| MoSi2发热元件的微观组织结构. 冯培忠，曲选辉，杜学丽.中国有色金属学报，第15卷第2期. 2005 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231058A (en) * | 2013-05-13 | 2013-08-07 | 中原工学院 | Preparation method of high temperature silicon molybdenum rods |
| RU2818057C1 (en) * | 2023-07-11 | 2024-04-23 | Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт химии силикатов им. И.В. Гребенщикова Российской академии наук (ИХС РАН) | Charge for producing composite material based on molybdenum disilicide |
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| Publication number | Publication date |
|---|---|
| CN100999023A (en) | 2007-07-18 |
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