Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 5, Pages 7253-7260Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.12.065
Keywords
Joining; Interfaces; Mechanical properties; ZrB2-SiC
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51105107, 51275135, 51305102, 51021002]
- Natural Science Foundation of Heilongjiang Province [QC2011C044]
- Specialized Research Fund for the Doctoral Program of Higher Education [20112302130005]
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A contact-reaction brazing technique with Ti and Ni interlayers was used to join ZrB2-SiC ceramics. The influence of Ti-Ni stack methods and Ti content to the microstructure of the joint was investigated. It was found that Ni could infiltrate into ZrB2-SiC during the heating process and led to excessive interfacial reactions. The TiB whiskers could be in situ synthesized in all range of Ti concentration (55-79 at% Ti) with Ti/Ni/Ti stack foils. Due to the diffusion behavior of Ti, B atoms and low interfacial energy of TiB in TiNi phase, a cross woven structure of TiB whisker was produced in the brazing seam. The microhardness tests demonstrated tight bonding between TiB and the matrix. The highest shear strength of 134 MPa was obtained from 65 at% Ti. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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