Evaluation of Microcracking and Phase Transformation by AE Wave Analysis in High Temperature Ceramics

通过 AE 波分析评估高温陶瓷中的微裂纹和相变

• 批准号: 60460078
• 负责人: KISHI Teruo
• 金额: $ 4.54万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60460078/
• 关键词: Ceramics; almina; microcrack; fracture; three dimensional location; radiation pattern; グリーン関数; アルミナ

AE Source Characterization and these dimensional location system was established to analyze the microcracks at the crack tip. Microfracture process in <Al_2> <O_3> ceramics has been evaluated by using this AE waveform analysis. It has been made clear by using AE source location technique that micraocracks nucleated at the tip front of artificial notch. Most of them have been evaluated as Mode I cracks because of the same phase radiation pattern of by AE source characterization. Those micrlcracks can be classified into two types with opposite roles for fracture behavior of ceramics. First one is useful microcracks to enhance fracutre resistance of ceramics, while the others become the origin of unstable fracture.

建立了声发射源表征和这些尺寸定位系统来分析裂纹尖端的微裂纹。利用声发射波形分析对<Al_2><O_3>陶瓷的微断裂过程进行了评估。利用声发射源定位技术明确了微裂纹在人工缺口尖端前端成核。由于 AE 源表征的同相辐射图，其中大多数已被评估为 I 型裂纹。这些微裂纹可分为两种类型，对陶瓷的断裂行为具有相反的作用。第一个是有用的微裂纹，有助于提高陶瓷的抗断裂能力，而其他微裂纹则成为不稳定断裂的根源。

项目成果

岸輝雄,榎学: 日本機械学会講演論文集. 860. 303-308 (1986)

Teruo Kishi，Manabu Enoki：日本机械工程师学会会议记录 860. 303-308 (1986)。

T. Kishi and M. Enoki: "Quantitative Characterization of Acoustic Emission and Its Application to the Evaluation of Microcracking" Transactions of the Japan Society of Mechanical Engineers. 860. 303-308 (1986)

T. Kishi 和 M. Enoki：“声发射的定量表征及其在微裂纹评估中的应用”日本机械工程师学会会刊。

T. Kishi, S. Wakayama, Y. Shinozaki, Y. Kagawa and E. Nakata: "Fracture Process during Fracture Toughness Testin in <Al_2> <O_3> Ceramics by AE Source Characterization" J. Japan Inst. Metals. 49. 707-713 (1985)

T. Kishi、S. Wakayama、Y. Shinozaki、Y. Kakawa 和 E. Nakata：“通过 AE 源表征<Al_2> <O_3> 陶瓷断裂韧性测试期间的断裂过程”J. Japan Inst.。

岸輝雄,若山修一: 新素材・基礎研究会セミナー 耐火物技術協会. 38-47 (1986)

Teruo Kishi，Shuichi Wakayama：新材料和基础研究小组研讨会，耐火材料技术协会 38-47 (1986)。

T. Kishi: "Acoustic Emission Source Characterization and its Application to Micro-cracking" Z. Metallunde.76. 512-518 (1985)

T. Kishi：“声发射源表征及其在微裂纹中的应用”Z. Metallunde.76。