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Eutectic composite powdery-sintering assistant for manufacturing structural ceramic and production thereof

A technology of sintering aids and composite powders, which is applied in the field of ceramic production technology in the Ming Dynasty, to achieve excellent technical performance, lower sintering pressure, and lower sintering temperature

Inactive Publication Date: 2005-10-12
李根法
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the sintering aid of eutectic composite ceramic powder is used for B 4 The sintering of structural ceramics such as C or SiC has not been reported yet.

Method used

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  • Eutectic composite powdery-sintering assistant for manufacturing structural ceramic and production thereof
  • Eutectic composite powdery-sintering assistant for manufacturing structural ceramic and production thereof
  • Eutectic composite powdery-sintering assistant for manufacturing structural ceramic and production thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] in figure 1 Medium SiC, VB 2 And B 4 C phase forms eutectic composite ceramic, VB 2 / SiC eutectic composite ceramic powder preparation formula is 67-71mol% VB 2 With 29-33mol% SiC, the melting temperature is 2150±30℃. VB 2 / SiC / B 4 The preparation formula of C eutectic composite ceramic powder is 20-24mol% VB 2 , 40-48mol% B 4 C, 30-36mol% SiC, melting temperature is 1870±30℃.

Embodiment 2

[0044] in figure 2 Medium SiC, VB 2 , B 4 C and C phases form eutectic composite ceramics. C / VB 2 / SiC eutectic composite ceramic powder preparation formula is 47-51mol% VN, 23-26mol% B 4 C. 24-28mol% SiC, melting temperature 2120±30℃. C / VB 2 / SiC / B 4 The preparation formula of C eutectic composite ceramic powder is 18-22mol% VN, 46-54mol% B 4 C. 26-34mol% SiC, melting temperature 1850±30℃. It can be seen from Examples 1, 2 that due to VB 2 / SiC, VB 2 / SiC / B 4 C, C / VB 2 / SiC and C / VB 2 / SiC / B 4 C and other eutectic composite ceramics have a melting temperature ratio VB 2 Or SiC or B 4 C is much lower. Therefore, using eutectic composite powder technology as a sintering aid, SiC or B can be prepared by liquid phase sintering at low temperature. 4 C and other hard-to-sinter ceramics.

Embodiment 3

[0046] in image 3 In VB 2 And SiC or VB 2 , SiC and B 4 C is the starting material, VB can be formed 2 / SiC or VB 2 / SiC / B 4 C eutectic composite ceramics.

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Abstract

An eutectic composite ceramic powder sintering assistant for manufacturing structural ceramic and its production are disclosed. It is carried out by preparing eutectic composite ceramic of TMB2 / SiC, TMB2 / SiC / B4C, C / TMB2 / SiC, TMB2 / TMC / SiC, TMB2 / SiC / MeB6, SiC / MeB6 / B4C, TiB2 / SiC / MeB6, C / TMB2 / SiC / B4C, TiB2 / SiC / MeB6 / B4C, and TMB2 / SiC / MeB6 / B4C by high-temperature melting solidifying method, crushing and grinding. It achieves lower sintering temperature and sintering pressure, higher density, strength and hardness of ceramic.

Description

Technical field [0001] The invention relates to ceramic production technology, in particular to a eutectic composite ceramic powder sintering aid and a preparation method thereof, such as TMB 2 / MeB 6 , TMB 2 / MeB 6 / B 4 C, VB 2 / SiC / B 4 C, C / VB 2 / SiC / B 4 C, VB 2 / SiC / VC, VB 2 / SiC / LaB 6 Or VB 2 / SiC / B 4 , C / LaB 6 Eutectic composite ceramic powder, this kind of sintering aid is used for B 4 Sintering of structural ceramics such as C or SiC. Background technique [0002] B 4 C and SiC have many excellent characteristics. As described in Thevenot, F.J.Eur.Ceram.Soc.1990,6,205, B 4 C has extremely high hardness and strength, low density, can block bullet shooting. Hot-pressed sintered B 4 C ceramic has been used to prepare body armor, lightweight armor plates and tools for helicopters and tanks, as described by Mingwei Chen, Iames W. McCauley, Kevin J. Hemker, SCIENCE, 2003, 299, 1563. SiC has the characteristics of high strength, high hardness, wear resistance, corrosion resistanc...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/64
Inventor 李根法
Owner 李根法
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