摘要
研究了Ａｌ２Ｏ３／ＴｉＣ复合陶瓷的高温弯曲断裂强度和弯曲切口强度。实验结果表明，该材料在６００℃以下，弯曲强度基本没有变化，８００℃时弯曲强度开始下降。６００℃弯曲切口强度与室温切口强度变化规律相同，可以由室温弯曲切口强度关系式预测。８００℃时切口敏感性降低，弯曲切口强度与室温下切口强度的变化规律不同。另外，对弯曲强度试样结果进行统计处理，分析表明该陶瓷材料的室温和高温弯曲强度和弯曲切口强度均符合Ｗｅｉｂｕｌ分布；相同温度的弯曲强度与切口强度的Ｗｅｉｂｕｌ模数基本相同；高温弯曲切口强度分散性均小于室温弯曲切口强度分散性。
Notch flexure strength of Al2O3 /TiC ceramics was tested at 20, 600and 800. Results show that the flexure strength keeps constant up to 600, and notch flexure strength can be calculated by equation(3). At 800, the flexure strength decreases, and the notch flexure strength doesn't obey equation (3) as the notch sensitivity decreases. The probability tests at high temperature show that the flexure strength and notch flexure strength follow Weibull distribution. The Weibull modules of various Kt are a constant at the same testing temperature. The dispersion of the values of flexure strength and notch flexure strength at 800 is lower than that at 20.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1999年第2期125-128,共4页
Acta Materiae Compositae Sinica
关键词
弯曲强度
弯曲切口强度
氧化铝
碳化钛
陶瓷
notch flexure strength, flexure strength, probability distribution, Al2O3 /TiC ceramics
