小球押込みによるセラミックスの強度低下に関する研究 : 窒化けい素に対する窒化けい素球押込み-弾性応答を仮定した場合
小球押込みによるセラミックスの強度低下に関する研究 : 窒化けい素に対する窒化けい素球押込み-弾性応答を仮定した場合
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小球压痕导致陶瓷强度降低的研究：氮化硅球对氮化硅的侵入——假设弹性响应
DOI：
10.1299/kikaia.63.392
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
豊文 阿部
中科院分区：
文献类型：
--
作者：
浩司 大串;恭二 本間;昌弘 市川;永年 岡部;徹 高松;隆文 松村;豊文 阿部
采用氮化硅球对氮化硅试样进行了压痕试验，建立了一种评价结构陶瓷表面球压痕或冲击损伤及压痕后残余强度的方法。用四点弯曲试验测量了压痕试样的残余强度。从圆锥裂纹的平衡条件出发，导出了压痕载荷与圆锥裂纹长度的关系。然后根据锥裂纹长度估算残余强度。估算值与锥裂长度估算值吻合较好。估计值与实测值吻合较好。只有在低压痕荷载区域，弹性变形占主导地位。
Indentation tests on silicon nitride specimens using a silicon nitride sphere were carried out in order to establish a method for evaluating sphere indentation or impact damage of surface layers and post-indentation residual strength in structural ceramics. The residual strengths of indented specimens were measured by four-point bending tests. The relationship between indentation load and cone crack length was derived from the equilibrium condition of cone crack. Then the residual strength was estlmated from the cone crack length. The estimated values were in good agreement with the was estimated from the cone crack length. The estimated values were in good agreement with the measured values. only in the region of low indentation load where elastic deformation is dominant.