摘要
以微米级氧化铝和SiC为原料,通过无压烧结工艺,制备出用于太阳能热发电的Al2O3/SiC复相陶瓷。添加10%(质量分数)SiC经1 480℃烧结的试样的体积密度达3.129 8 g/cm3,抗折强度达110.34 MPa,抗热震循环(室温—1 000℃)20次无裂纹。探讨了SiC添加量对Al2O3/SiC复相陶瓷微观结构和性能的影响,结果表明:SiC添加量超过10%时试样会产生"夹层"现象;Al2O3陶瓷中添加适量SiC可提高复相陶瓷的抗热震性。
By pressureless sintering, Al2O3/SiC composite ceramics used in solar thermal power were prepared by micrometric Al2O3 and SiC powers. Bulk density and bending strength of samples with 10% （quality fraction） SiC sintered in 1 480℃ were 3. 129 8 g/cm^3, 110.34 MPa respectively. The samples did not crack through 20 times thermal cycling from room temperature to 1 000 ℃. The effect of addition quantity of SiC on microstructure and performance of Al2O3/SiC composite ceramics was investigated. The results shown that ＂sandwich＂ phenomenon appeared with adding more then 10 % SiC; Adding proper SiC would be contributel to improve thermal shock resistance of composite ceramics.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第13期8-11,48,共5页
Journal of Wuhan University of Technology
基金
863计划项目(2008AA05Z418)
