EFFECT OF GRAIN-SIZE ON STRENGTH AND FRACTURE-TOUGHNESS IN ALUMINA
EFFECT OF GRAIN-SIZE ON STRENGTH AND FRACTURE-TOUGHNESS IN ALUMINA
复制标题
DOI：
10.1299/jsmea1993.37.3_231
复制
发表时间：
1994-07-01
期刊：
影响因子：
--
通讯作者：
INOUE, M
中科院分区：
文献类型：
--
作者：
MIYAHARA, N;YAMAISHI, K;INOUE, M
通过对不同晶粒度氧化铝试样的三点弯曲和断裂韧性试验，研究了晶粒度对氧化铝抗弯强度和断裂韧性的影响。抗弯强度随晶粒尺寸的减小而增大。本征断裂韧性，它可以通过CSF方法获得，是独立的晶粒尺寸。另一方面，表观断裂韧性与缓慢的裂纹扩展随着晶粒尺寸的增加，由于R曲线的行为，这是发现在BI，FP和CN试样中的粗晶粒的材料。
Three-point bending and fracture toughness tests of alumina specimens with various grain sizes were carried out to investigate the effects of grain size on bending strength and fracture toughness. The bending strength increased with decreasing grain size. The intrinsic fracture toughness, which can be obtained by the CSF method, is independent of grain size. On the other hand, the apparent fracture toughness with slow crack growth increased with increasing grain size due to the R-curve behavior, which was found for materials with coarse grains in the BI, FP and CN specimens.