摘要
Abstract
It has excellent performance at high temperature,high strength or high oxidation resistance at relatively high tem-perature with the ceramic of strong interface and was a kind of high performance ceramic material with excellent perform-ance.It is widely used in the field of recyclable.There was no doubt that the material was polished and placed at different temperatures.It can help us to test the high temperature mechanical properties.After the temperature was reached for 30 minutes,the test temperatuerwas reached,the stress was applied to the material until the material sample was completely broken.The maximum applied force and the corresponding intensity will through the scanning electron microscope samples on the test after the sample surface and fracture analysis.The results showed that the bending strength of the material is different in both parallel and vertical directions,first decreases in the parallel direction with increasing temperature,decrea-ses of increasing temperature in the vertical direction,and its strength is at 1 200℃,there are 396.78 MPa and 435.90 MPa two peaks,when the intensity reaches the minimum,220.7 MPa and 195.15 MPa in 1 500 ℃.With the analysis,the ben-ding strength in the vertical direction was higher than the parallel direction,and the bending strength decreases with the temperature.However,there is a minimum value at 1 300 ℃ because B2O3was decomposed by heat and the defects caused by the high temperature of the material itself caused by the vertical direction above the parallel direction.It is due to the an-isotropy of the material,the vertical strength was relatively larged.关键词
强界面陶瓷/热压烧结/弯曲强度/高温力学性能/高温陶瓷Key words
Strong interface ceramics/Hot pressing sintering/Bending strength/High temperature mechanical properties/High temperature ceramics分类
化学化工
