期刊
MATERIALS LETTERS
卷 182, 期 -, 页码 159-162出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.06.111
关键词
Ceramic composites; Structural optimization; Welding; Residual stress; Etching treatment
资金
- National Natural Science Foundation of China [51575135, U1537206]
- Shanghai Aerospace Science and Technology Fund [SAST201464]
The high-quality joint between SiO2f/SiO2 and Nb was achieved by regulating the surface structure of SiO2f/SiO2. The fused silica as fillers in SiO2f/SiO2 surface layer was consumed by etching treatment, and quartz fibers braided in two dimensions wereleft. By etching treatment, the wettability of SiO2f/SiO2 was improved and the contact angle dropped from 138 degrees to 37 degrees. Furthermore, the surface structure of SiO2f/SiO2 was deviated from a flat to a 3D-weave, which induced the brazing alloy infiltrating into SiO2f/SiO2 and formed a 3D-pinning structure in joint. It could reduce residual stress and enlarge joining area, which strengthened the joint. (C) 2016 Elsevier B.V. All rights reserved.
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