【摘要】 将零厚度单向试件栅刻蚀工艺应用于晶须增韧氮化硅陶瓷基复合材料表面。通过记录试件所在桥路的输出电压值，可得到随载荷不断增大裂纹逐渐向前扩展过程中每一时刻的裂尖位置和裂纹长度，从而得到该种材料的阻力曲线．更多还原

【Abstract】 The etching technique of the single-lined zero-thickness specimen grating is applied on the surface of the fiber toughening Si3N4 ceramic composite specimen. The position of the crack and the crack length during the process of-crack extension when the load is applied and gradually increased can be determined by recording the output voltage value of the wheatstone bridge in which the ceramic specimen with the fracture grating on is located. The crack - growth- resistance (R-curve)of this material is thus obtained.更多还原