耿桂宏,罗绍华,毕晓露,武聪,陈宇红,韩非

• 1:北方民族大学材料科学与工程学院
• 2:东北大学秦皇岛分校资源与材料学院
• 3:北京理工大学材料学院

摘要(Abstract)：

以低压铸造用升液管为研究目的,以Y2O3-Al2O3-Fe2O3为复合烧结助剂,磨切单晶硅废料Si粉和SiC为主料,反应烧结法制备Si3N4/SiC复相陶瓷。研究了Y2O3含量对复合材料结构和力学性能的影响,采用XRD、SEM对复合材料的相组成、微观形貌进行分析。结果表明,反应烧结后试样生成Si3N4结合SiC晶粒为主相的烧结体,并含有少量Sialon晶须及未反应的Si。Y2O3含量对复相陶瓷力学性能影响很大,在分析稀土Y2O3作用机理的基础上,得到2.5%Y2O3优化试样的力学性能优良,相对密度达到88%,维氏硬度达到1.1 GPa,常温抗弯强度50 MPa。

关键词(KeyWords)： Si3N4/SiC复相陶瓷;Y2O3;烧结助剂;反应烧结;力学性能

Abstract:

Keywords:

基金项目(Foundation): 宁夏自然科学基金资助项目(NZ0843);; 中央高校基本科研业务费(N100423002);; 河北省应用基础研究计划重点基础研究项目(09963910D);; 北方民族大学自主科研资金项目(1102)

作者(Author): 耿桂宏,罗绍华,毕晓露,武聪,陈宇红,韩非

DOI: 10.13289/j.issn.1009-6264.2012.07.005

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