X-Ray Measurement of Residual Stresses in Ceramics and Strength Evalution

陶瓷残余应力的 X 射线测量和强度评估

• 批准号: 61550055
• 负责人: TANAKA Keisuke
• 金额: $ 1.22万
• 依托单位: Kyoto 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: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550055/
• 关键词: X-ray stress measurement; Ceramics; 残留応力; X線応用測定

1. The X-ray elastic constants of sintered alumina were measured for the diffraction planes (1.0.10), (220), (2.1.10), (146), and (4.0.10). The order of the magnitude of E/(1+<nu>) (E=Young's modulus, =Poisson's ratio) for each plane agreed with the theoretical value obtained from the elastic constants of a single crystal on the basis of Reuss model. The magnitude itself was smaller than the predicted value because of porosity.2. The X-ray diffraction planes switable for an accurate measurement of residual stresses in four engineering ceramics were determined as follows: (2.1.10) for <alpha>-Al_2O_3, (411) and (323) for <beta>-Si_3N_4, (213) and (2.0.15) for SiC (6H), and (133) for 3%mol Y_2O_3-ZrO_2.3. The X-ray elastic constant, E/(1+<nu> of alumina and silicon nitride was measured by using the synchrotron radiation source. X-ray diffraction was recorded with a position sensitive detector. The measured value agreed well with that obtained from an ordinary method utilizing the parallel beam method of characteristic X-rays.4. The residual stresses measured on as-fired, lapped and ground surfaces of ceramics were all compression. The compressive residual stress in the direction perpendicular to the grinding direction was about twice the value in the grinding direction. The magnitude of the compressive residual stress got larger with increasing diamond grain size of a cutting wheel, while it was insensitive to the cutting depth. In partialy stabilized zirconia, the full width at half maximum of X-ray diffraction profiles and the amount of transformation from tetragonal to monoclinic phase increased with increasing diamond grain size of a cutting wheel.5. The size of indentation cracks was sensitive to the residual stress measured by X-rays. Fracture mechanics analysis will be necessary to assess the residual stress effect on cracking in ceramics.

1.测量了烧结氧化铝在（1.0.10）、（220）、（2.1.10）、（146）和（4.0.10）衍射面的X射线弹性常数。各晶面的E/（1+<nu>）（E=杨氏模量，E =泊松比）的数量级与根据Reuss模型由单晶弹性常数得到的理论值一致。由于孔隙度的影响，震级本身小于预测值.本文确定了四种工程陶瓷残余应力的可转换X射线衍射面：-Al_2O_3的（2.1.10）面，-Si_3N_4<alpha>的（411）面和（323）面<beta>，SiC（6 H）的（213）面和（2.0.15）面，以及3%molY_2O_3-ZrO_2的（133）面。用同步辐射光源测量了氧化铝和氮化硅的X射线弹性常数E/（1+）<nu>。用位置敏感检测器记录X射线衍射。测量值与利用特征X射线平行束法的常规测量值吻合较好。陶瓷烧成表面、研磨表面和磨削表面的残余应力均为压应力。垂直于磨削方向的残余压应力约为磨削方向残余压应力的两倍。残余压应力的大小随金刚石粒度的增大而增大，但对切削深度不敏感。在部分稳定氧化锆中，X射线衍射曲线的半高宽和从四方相到单斜相的转变量随着切割轮金刚石粒度的增加而增加.压痕裂纹的尺寸对X射线测量的残余应力敏感。断裂力学分析对于评估残余应力对陶瓷开裂的影响是必要的。

项目成果

田中啓介: 材料. 36. 792-798 (1987)

田中圭介：材料 36. 792-798 (1987)

keisuke Tanaka: "X-Ray Stress Measurement of Sintered Alumina" Journal of the Society of Materials Science, Japan. 36. 749-754 (1986)

keisuke Tanaka：“烧结氧化铝的 X 射线应力测量”日本材料科学学会杂志。

田中 啓介: 材料. 35. 749-754 (1986)

田中圭介：材料 35. 749-754 (1986)

Keisuke Tanaka: "Stress Measurement of Ceramics by Means of X-Rays Radiated from a Synchrotron" Transactions of the Japan Society of Mechanical Engineers. 53. 1267-1272 (1987)

Keisuke Tanaka：“通过同步加速器辐射的 X 射线对陶瓷进行应力测量”日本机械工程师学会会刊。

田中啓介: 機械の研究. 40. 265-272 (1988)

田中圭介：机械研究 40. 265-272 (1988)。