温度对结构陶瓷弯曲性能的影响

Influence of Temperatures on the Flexural Properties of Structural Ceramics

通过四点弯曲试验方法，初步讨论了Ａｌ２Ｏ３和Ｓｉ３Ｎ４两种陶瓷材料高温下弯曲性能与温度的关系。试验发现，Ａｌ２Ｏ３材料在１０００℃以下，强度变化不明显，但随温度进一步升高，强度明显下降。Ｓｉ３Ｎ４材料在高温下具有明显的塑性变形能力。

In this paper, the flexural properties of ceramic materials (Al2O3 and Si3N4) at high temperatures were studied by the fourpoint bending method The auther investigated the relation between the flexural properties and temperatures for ceramic materials The experimental results show that the flexural strength is unchanged when temperature is less than 1000℃, but it sharply decreased with temperature rising above 1000℃Si3N4 has the bigger deformation ability at high temperatures