ZrB2-Si3N4高温复相陶瓷的制备及抗氧化机理研究

材料导报, 2010, 24(z2): 519-528.

ZrB2-Si3N4高温复相陶瓷的制备及抗氧化机理研究

宋杰光 ^1, , 李世斌 ^2, , 纪岗昌 ^3, , 李伟 ^4, , 徐斌 ^5, , 张小强 ^6,

1.九江学院机械与材料工程学院,九江,332005;九江学院九江市绿色再制造重点实验室,九江,332005

2.九江学院机械与材料工程学院,九江,332005;九江学院九江市绿色再制造重点实验室,九江,332005

3.九江学院九江市绿色再制造重点实验室,九江,332005

4.九江学院机械与材料工程学院,九江,332005

5.九江学院机械与材料工程学院,九江,332005

6.九江学院机械与材料工程学院,九江,332005

基金项目: 九江学院大学生自主创新性实验项目(09XSCXXSY13) 江西省高校省级教改项目(JXIG-09-17-6) 江西省教育厅青年科学基金(GJJ09595)

关键词：二硼化锆 , 氮化硅 , 复相陶瓷 , 真空热压烧结 , 氧化机理

Preparation and Resistance Oxidation Mechanism of ZrB2-Si3N4 High-temperature Multi-phase Ceramics

由于ZrB2具有极高的熔点、强度、硬度和导电率等许多优异性能,因而其应用领域非常广泛.研究了ZrB2-Si3N4复相陶瓷的制备和高温下的氧化机理.结果表明,在1700℃、15MPa、2h烧结务件下制备的ZrB2-20%Si3N4复相陶瓷的致密度为98%左右.ZrB2-Si3N4复相陶瓷在高温氧化时生成了SiO2,并且SiO2液相容易在复相陶瓷表面富集形成一层保护膜,有望提高陶瓷在更高氧化温度下的抗氧化性能.

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