Method for preparing composite material in symmetrical gradient between metallic material and ceramic material |
Title： |
| Method for preparing composite material in symmetrical gradient between metallic material and ceramic material |
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Application Number： |
200610089765 |
Application Date： |
2006/07/14 |
Announcement Date： |
2007/02/21 |
Pub. Date： |
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Publication Number： |
1916201 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C22C 1/05, H01B 1/00, B32B 15/00 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Li Jingfeng, Zhang Huaiquan |
Key Words： |
composite material, symmetrical gradient, metallic material, ceramic material |
Abstract： |
This invention discloses a method for preparing symmetric gradient metal/ceramic composite. The method comprises: (1) sintering aluminum nitride ceramic at a low temperature by plasma-discharging sintering; (2) adding an appropriate amount of Cu powder into aluminum nitride coarse powder to improve its surface property; (3) preparing aluminum nitride symmetric porous gradient material, and infiltrating Cu into it at a low temperature. The method solves the problem of poor bonding between Cu and aluminum nitride ceramic, and can realize preparation of gradient composite with high temperature difference and poor compatibility. The composite has good insulation and thermal conductivity in the thickness direction and good planar electric conductivity, thus can be used as electric heater. |
Claim： |
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