超声C扫描在C/SiC复合材料与钛合金薄板钎焊质量中的应用  

Application of Ultrasonic C-scan in the Brazing Quality of C/SiC Composite and Titanium Alloy

作　　者：罗明[1] 张颖[1] 吴时红[1] 赵建华[1] 何双起[1] 

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《宇航材料工艺》2015年第6期87-90,共4页Aerospace Materials & Technology

摘　　要：通过超声水浸脉冲法对C/SiC复合材料的声阻抗进行测定,结果表明,其声阻抗介于（4.0~4.7）×106kg/m2s之间;未焊合时界面反射系数约为1,焊接良好时界面反射系数介于0.71~0.74之间。为使未焊合时界面反射信号幅度比焊接良好时至少相差6 d B,C扫描检测时应监测二次以上界面反射信号幅度,并采用金相的方法对C扫描结果进行验证,二者一致性较好。The sound impedance of C/SiC composite is measured by the method of ultrasonic immersing pulse echo, and which is between 4.0 ~ 106 kg/m2s and 4.7 ~ 106 kg/m2 s. The relationship of reflection is about 1 when there is crack in brazing interface and it is between 0.71 and 0.74 when there is no crack. For the differential value of the amplitude of reflection wave is at least 6 dB between two status, the amplitude of more than second reflection wave will be monitored when C-scan. The result of C-scan is certified by metallographic analysis, and the uniformity of both is good.

关 键 词：超声C扫描 C/SIC复合材料 钛合金薄板 钎焊质量 

分 类 号：TB553[理学—物理]