摘要
陶瓷基复合材料具有耐高温、耐腐蚀、高比强度等诸多优点,在航空航天领域的应用越来越广泛。受制备工艺和原材料等原因限制,产品会产生各种缺陷。能够进行缺陷检测的无损检测方法有超声波、CT、红外热成像、X射线等。本文基于微焦点CT系统,开展调节片类薄壁陶瓷基复合材料的检测试验。确定微焦点CT具备整体零件亚毫米级孔检测能力,且测量结果更准确。微焦点CT可以获得夹杂物、裂纹、断丝等缺陷清晰检测图像,能够实现材料孔隙率计算。
Ceramic matrix composite is increasingly wide used because of many advantages such as high temperature resistance,corrosion resistance and high specific strength.However,various defects can be created in the production because of the limitation of raw material and manufacturing process,and those defects can be detected by ultrasonic inspection,CT,infrared thermal imaging,X-ray inspection and so on.Based on the micro-focus CT system,this article investigates the testing method of adjustment sheet parts made of ceramic based composite.It is verified that micro-focus CT system is capable of detecting sub-millimeter holes in the production,and the result of measurement is accuracy.Besides,the micro-focus CT can obtain clear images of defects such as inclusion,crack and wire break-off.Furthermore,this CT system can achieve the calculation of porosity rate in the material.
作者
熊瑛
刘海强
杜本莉
王树鹏
方建明
XIONG Ying;LIU Haiqiang;DU Benli;WANG Shupeng;FANG Jianming(AECC Shenyang Liming Aero-Engine Co.,Ltd.,Shenyang 110043,China)
出处
《航空制造技术》
2018年第19期58-63,共6页
Aeronautical Manufacturing Technology
关键词
陶瓷基复合材料
微焦点CT
断丝
孔隙率
纤维分布
衰减系数
Ceramic matrix composite
Micro-focus CT
Broken fiber
Voidage
Fiber distribution
Obsorption coefficien
