SiC颗粒增强铝基复合材料中增强体含量的超声检测  

Ultrasonic testing of reinforcement content in SiC particle reinforced aluminum matrix composites

作　　者：杨平华 何方成 梁菁 唐鹏钧 YANG Pinghua;HE Fangcheng;LIANG Jing;TANG Pengjun(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Beijing 100095,China;Key Laboratory of Aeronautical Materials Testing and Evaluation,Aero Engine Corporation of China,Beijing 100095,China;Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]航空材料检测与评价北京市重点实验室,北京100095 [3]中国航空发动机集团材料检测与评价重点实验室,北京100095 [4]材料检测与评价航空科技重点实验室,北京100095

出　　处：《无损检测》2021年第9期1-6,共6页Nondestructive Testing

基　　金：国防科工局技术基础科研项目(JSZL2016205C002)。

摘　　要：通过理论分析建立了一种基于纵波声速评价SiC颗粒增强铝基(SiC_(p)/Al)复合材料中增强体含量及孔隙率的超声检测模型,随后采用粉末冶金工艺制备了增强体体积分数分别为10%,15%,20%,25%,30%的SiC_(p)/Al复合材料试样,实测纵波声速、增强体含量及孔隙率后建立了三者之间的关系曲线,最后利用实测关系曲线对标称体积分数为20%的SiC_(p)/Al复合材料试样中的增强体含量进行了推算。试验结果表明,实测关系曲线与模型计算得到的理论预测曲线具有良好的一致性,试样增强体含量超声检测的相对误差为5.2%,证明了该方法的可行性。该方法在检测增强体含量的同时考虑了孔隙率的影响,为先进金属基复合材料的无损检测提供了一种新思路。An ultrasonic testing model for the volume fraction of SiC and porosity in SiC particle reinforced aluminum matrix(SiC_(p)/Al)composite was established through theoretical analysis,which was based on the ultrasonic velocity of longitudinal wave.SiC_(p)/Al composite samples with SiC volume fraction of 10%,15%,20%,25%,30%were prepared by powder metallurgy process respectively.The velocity,SiC volume fraction and porosity of those samples were measured,then an experimental relation curve between measured velocity,SiC volume fraction and porosity was established.And finally,the SiC volume fraction of another SiC_(p)/Al composite sample with a nominal volume fraction of 20%was calculated using the experimental relation curve.The results indicate that the experimental relation curve is in good agreement with the theoretical prediction curve calculated by the model,the relative error of the SiC volume fraction evaluated byultrasonicmethodis5.2%,which proves the feasibility of this method.The research considers the effect of porosity while detecting the SiC volume fraction,which provides a new idea for nondestructive evaluation of metal matrix composites.

关 键 词：超声检测 SiC_(p)/Al复合材料 增强体含量 孔隙率 

分 类 号：TG115.28[金属学及工艺—物理冶金]