摘要
用不同的压痕方程计算了ＺｒＯ＿２增韧ＭｏＳｉ＿２复合材料的室温断裂韧性Ｋ＿（１ｃ）值，同时研究了压痕载荷对Ｋ＿（１ｃ）值的影响，结果表明，试验材料在试验条件下的断裂韧性不遵从半月状裂纹系统方程，而遵从巴氏裂纹系统方程，其室温压痕断裂韧性保持与压痕载荷的独立性。
The fracture toughness of ZrO_2-toughened MoSi_2 composites made by hotpress-ing was calculated by various indentation equations and the effects of indentation loads on K_(1c)value of the composite were also investigated. It was demonstrated that the K_(1c)values of thetest material obey palmquist crack system equations and the fracture toughness was indepen-dent of indentation load on the sample. The fracture toughness calculated by median cracksystem equations revealed a decreasing R curve , thus the median crack system equations can-not be used to oalculate the fracture toughness of the tested material.
出处
《甘肃工业大学学报》
1995年第4期32-35,共4页
Journal of Gansu University of Technology
