Research on Deformation Behavior by Contact Stress and Microstructure of Silicon Carbide

碳化硅接触应力变形行为及微观结构研究

• 批准号: 04650706
• 负责人: UCHIYAMA Yasuo
• 金额: $ 1.15万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650706/
• 关键词: Silicon Carbide; Contact stress; Round Indenter; Deformation; Contact Damage; Microstructure; Radial Crack; Hertzian Crack

Four kinds of silicon nitride ceramics with different grain sizes and different amounts of the boundary phase were prepared, and the polished surface of the samples was indented with a round diamond indenter. The morphology of the surface deformation, cracks and the structure under the indented surface were investigated. After indentation, a round impression was formed on the surface and the swelling was found around the impression. The diameter and the maximum depth of the impression were larger in the samples with a large grain size and a large amount of the boundary phase. Two types of cracks were observed, namely a radial crack and a Hertzian crack. The radial crack propagated from the impression above the indentation load of 147 N, and its length was larger in the samples with a coarse grain size. The Hertzian crack was found inside the impression of the samples with a fine grain size. After etching in a NaOH melt a ring shape area was corroded away from the indented samples. The area of the corroded region depended on the grain size and the amount of the boundary phase. Load-depth curve during loading and unloading depended on the amount of the boundary phase.

制备了4种不同晶粒尺寸和不同边界相含量的氮化硅陶瓷，并用圆形金刚石压头对样品的抛光表面进行压痕处理。研究了压痕表面的变形形貌、裂纹形貌及压痕表面下的组织。压痕后表面形成圆形压痕，压痕周围出现肿胀。晶粒尺寸越大、边界相越多的样品，压痕直径和最大深度越大。观察到两种类型的裂纹，即径向裂纹和赫兹裂纹。在147n压痕载荷以上，径向裂纹由压痕扩展，且在晶粒尺寸较粗的试样中，径向裂纹的长度较大。在样品的印痕内发现了赫兹裂纹，晶粒尺寸较小。在NaOH熔体中蚀刻后，从缩进的样品上腐蚀出环状区域。腐蚀区域的面积取决于晶粒尺寸和边界相的数量。加载和卸载过程中的荷载-深度曲线取决于边界相的量。

项目成果

Yasuo Uchiyama, Kyozo Sahara, Hui Ming Cheng, Kazuo Kobayashi, Shigetaka Wada, Hiroaki Makino and Nobuo Kamiya: "Microstructure of Silicon nitride Ceramics and Morphology of Surface Damage Induced by Round Indenter" J.Ceram.Soc., Japan. 102, 4. 34-38 (199

Yasuo Uchiyama、Kyozo Sahara、Hui Ming Cheng、Kazuo Kobayashi、Shigetaka Wada、Hiroaki Makino 和 Nobuo Kamiya：“氮化硅陶瓷的微观结构和圆形压头引起的表面损伤的形貌”J.Ceram.Soc.，日本。

K.SAHARA,Y.UCHIYAMA,H.M.CHENG,K.KOBAYASHI,H.MAKINO,S.WADA: "Proceedings of the 9th Korea-Japan Seminar on New Ceramics" The Organizing Committee of The 9th Korea-Japan Seminar on New Ceramics, 396 (1992)

K.SAHARA、Y.UchiYAMA、H.M.CHENG、K.KOBAYASHI、H.MAKINO、S.WADA：《第九届韩日新陶瓷研讨会论文集》第九届韩日新陶瓷研讨会组委会，

内山休男: "窒化ケイ素焼結体の微細組織と圧子圧入による表面変形" 日本セラミックス協会学術論文誌. 102. 34-38 (1994)

Yasuo Uchiyama：“氮化硅烧结体的微观结构和压痕引起的表面变形”日本陶瓷学会杂志 102. 34-38 (1994)。

小林 和夫: "異なる微構造を有するSi_3N_4セラミックスのコンタクトストレスによる表面変形挙動" 学振124委員会資料NO.124-64-19-92. 1-4 (1992)

Kazuo Kobayashi：“不同微观结构的 Si_3N_4 陶瓷的接触应力导致的表面变形行为”JSPS 124 委员会资料第 124-64-19-92 号（1992 年）。

内山 休男: "窒化珪素焼結体の微細組織と球状圧子圧入による表面変形" 日本セラミックス協会学術論文誌. 102(4). 34-38 (1994)

Yasuo Uchiyama：“氮化硅烧结体的微观结构和球形压痕引起的表面变形”日本陶瓷学会杂志 102(4) (1994)。