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Characterization of SiC Ceramic Joints Brazed Using Au-Ni-Pd-Ti High-Temperature Filler Alloy
He, Huamin; Lu, Chuanyang; He, Yanming; Zheng, Wenjian; Yang, Jianguo; Wang, Limei; Sun, Yuan; Gao, Zengliang
2019-03-20
Source PublicationMATERIALS
ISSN1996-1944
Volume12Issue:6
AbstractIn this work, (Au79Ni17Pd4)(96)Ti-4 (wt.%) filler alloy was designed and employed to join SiC ceramics. The effects of brazing temperature and soaking time on the microstructure and fracture morphology of joints were investigated. The results show that the joint obtained can be described as SiC/reaction layer/braze/reaction layer/SiC. The reaction layer was composed of TiC and Au (Si, Ti). The wettability of the filler alloy toward the SiC ceramics was analyzed. The braze zone was mainly constituted by Pd2Si, Ni2Si, and Au (Ni, Si). A large number of nano-sized TiC particles were distributed within the Au (Ni, Si) layer. The formation mechanism of the braze containing different phases was discussed. The brazing temperature and soaking time had a significant effect on the reaction layer at the SiC/braze interface and TiC particles within the Au (Ni, Si) layer, while they showed a negligible effect on the Pd2Si and Ni2Si within the braze. The inherent reason was also clarified in detail. The joint fractography indicated that a good bonding was achieved between the filler alloy and SiC, while joint fracture was primarily induced by the thermal stresses residing after the brazing cycle.
KeywordSiC ceramic high-temperature brazing microstructure residual stress
Indexed BySCI
Language英语
WOS IDWOS:000464359900008
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81274
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
He, Huamin,Lu, Chuanyang,He, Yanming,et al. Characterization of SiC Ceramic Joints Brazed Using Au-Ni-Pd-Ti High-Temperature Filler Alloy[J]. MATERIALS,2019,12(6).
APA He, Huamin.,Lu, Chuanyang.,He, Yanming.,Zheng, Wenjian.,Yang, Jianguo.,...&Gao, Zengliang.(2019).Characterization of SiC Ceramic Joints Brazed Using Au-Ni-Pd-Ti High-Temperature Filler Alloy.MATERIALS,12(6).
MLA He, Huamin,et al."Characterization of SiC Ceramic Joints Brazed Using Au-Ni-Pd-Ti High-Temperature Filler Alloy".MATERIALS 12.6(2019).
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