李小雷,李尚升,王利英,宿太超,马红安,贾晓鹏

• 1:河南理工大学材料科学与工程学院
• 2:吉林大学超硬材料国家重点实验室

摘要(Abstract)：

在流动N2保护下,对高压烧结制备的AlN(Y2O3)陶瓷进行了热处理,研究了热处理对AlN陶瓷显微组织及导热性能的影响。结果表明:在970℃热处理2 h后的AlN陶瓷材料与未热处理的试样相比,晶粒尺寸显著增大,晶粒形状越发规整,析出相均位于晶界处或者三角晶界区域,热导率从77.3 W/(m.K)提高到了156.7 W/(m.K)。但是,将热处理时间延长到4 h,AlN陶瓷的气孔增大,出现了反致密化现象,热导率也降低到92.6 W/(m.K)。

关键词(KeyWords)： 热处理;AlN陶瓷;热导率;显微结构;高压烧结

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50572032)

作者(Author): 李小雷,李尚升,王利英,宿太超,马红安,贾晓鹏

DOI: 10.13289/j.issn.1009-6264.2011.02.009

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