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激光毛化对Cf/SiC与TC4钎焊接头组织及性能的影响
李海刚1, 毕建勋1, 马武军2, 邱金莲2, 李栋1
1.航天材料及工艺研究所, 北京 100076;2.上海空间推进研究所, 上海 200223
摘要:
由于线胀系数差异大,Cf/SiC复合材料与TC4钛合金钎焊接头容易形成较大的内应力而开裂失效。为了进一步提高接头强度,应用激光毛化工艺在Cf/SiC表面烧蚀出微孔,采用银基钎料对Cf/SiC与TC4进行钎焊。焊后对接头力学性能进行测试,对接头界面及断口显微组织进行观察。结果表明:焊前对Cf/SiC表面进行激光毛化处理,钎料能够填充微孔并形成良好的钎焊界面,能够提高Cf/SiC与TC4钎焊接头的剪切强度。
关键词:  激光毛化  Cf/SiC陶瓷基复合材料  钛合金  钎焊
DOI:10.12044/j.issn.1007-2330.2017.01.008
分类号:TG454
基金项目:
Influence of Laser Roughing Technology on Microstructureand Properties of Cf/SiC-TC4 Brazing Joints
LI Haigang1, BI Jianxun1, MA Wujun2, QIU Jinlian2, LI Dong1
1.Aerospace Research Insitute of Materials & Processing Technology, Beijing 100076;2.Shanghai Institute of Space Propulsion, Shanghai 200233
Abstract:
Micro-holes were ablated on the brazing sureface of Cf/SiC CMCs by laser roughing technology. And the Cf/SiC-TC4 brazing joint was achieved by Ag-based filler. Then mechanical properites were tested, the microstructure of the joints and the shear fracture were observed. The results show that, the filler can filled the micro-holes, and the shearing strength of the joints were enhanced.
Key words:  Laser roughing technology  Cf/SiC CMCs  Titanium  Brazing