Establishment of X-Ray Stress Measurement Method of Ceramics and Ceramic Composites

陶瓷及陶瓷复合材料X射线应力测量方法的建立

基本信息

批准号：
04302027
负责人：
TANAKA Keisuke
金额：
$ 5.76万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
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/grant/KAKENHI-PROJECT-04302027/
关键词：
X-ray stress measurement Residual stress Residual stress Ceramics Ceramic composites Ceramic coating X-ray elastic constant Thin film Fracture mechanics セラミックス複合材料イメージングプレート

项目摘要

1. A collaborating work of X-ray measurement of elastic constants and residual stress of Al_2O_3 and Si_3N_4 indicated that Al_2O_3 2.1.10 diffraction by Fe-Kalpha radiation and Si_3N_4 411 diffraction by V-Kalpha radiation were best suited for stress measurement.2. A new method for measurement of a steep gradient of residual stress below the ground surface of ceramics was proposed by using the glancing X-ray diffraction method.3. An imaging plate is useful for recording X-ray diffraction patterns, especially for measurement of stress in a local area. The cosalpha method is recommended to improve the accuracy of stress measurement.4. The X-ray method for measuring the triaxial state of residual stresses in ceramic composites such as Al_2O_3/ZrO_2, Al_2O_3/SiC, SiC/Al-alloy and WC-Co alloy is established.5. The residual stress in TiC film coated on several substrate by the CVD method was a function of the difference in the coefficient of thermal expansion.6. The c-axis of AIN films deposited on glass by sputtering is perpendicular to the specimen surface. A new method was proposed for stress measurement of such films.7. Composite coating of SiC and TiC by the CVD method does not have a strong texture, and need the triaxial stress analysis.8. Grinding residual stresses of Si_3N_4, Al_2O_3 and ZrO_2 were compression on the surface and decreased rapidly beneath the surface.9. The bending strength of ground Al_2O_3 and Si_3N_4 was increased when bent in the direction parallel to the grinding direction, while decreased when bent in the perpendicular direction. For the case of ground ZrO_2, the bending strength was increased for both directions.10. The R-curve method was proposed to predict the strength for fracture from small defects in ceramics.

1．对Al_2O_3和Si_3N_4弹性常数和残余应力的X射线测量合作表明，Fe-Kα辐射的Al_2O_3 2.1.10衍射和V-Kα辐射的Si_3N_4 411衍射最适合应力测量。2．提出了利用掠射X射线衍射法测量陶瓷磨削表面以下陡峭梯度残余应力的新方法。 3．成像板可用于记录 X 射线衍射图案，尤其是测量局部区域的应力。推荐使用cosalpha方法，以提高应力测量的准确性。4．建立了Al_2O_3/ZrO_2、Al_2O_3/SiC、SiC/铝合金、WC-Co合金等陶瓷复合材料残余应力三轴状态的X射线测量方法。 5． CVD法在几种基体上沉积的TiC薄膜的残余应力是热膨胀系数差异的函数。 6．通过溅射沉积在玻璃上的 AIN 薄膜的 c 轴垂直于样品表面。提出了一种测量此类薄膜应力的新方法。 7． CVD法制备的SiC和TiC复合涂层织构不强，需要进行三轴应力分析。 8． Si_3N_4、Al_2O_3和ZrO_2磨削残余应力在表面受压，在表面以下迅速减小。9．磨削后的Al_2O_3和Si_3N_4的弯曲强度在平行于磨削方向弯曲时增加，而在垂直方向弯曲时降低。对于研磨ZrO_2 的情况，两个方向的弯曲强度都增加了。10．提出了 R 曲线方法来预测陶瓷中小缺陷的断裂强度。