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conferenceseries
.com
Volume 5, Issue 6 (Suppl)
J Mat. Sci.
ISSN: 2321-6212
Advanced Materials 2017
October 26-28, 2017
OCTOBER 26-28, 2017 OSAKA, JAPAN
13
TH
INTERNATIONAL CONFERENCE ON
Advanced Materials and Nanotechnology
Microstructure and mechanical properties of SiC/SiC joints brazed with Ti-Ni and Ti-Ni-Zr filler alloy
Qin Qi, Huiwen Hu and Jie Zhang
Harbin Institute of Technology, China
S
iC ceramic has great potential used in machinery manufacturing, automobile, aerospace and nuclear fields, because of its
excellent properties, such as high hardness, good thermal conductivity and good mechanical property at high temperature.
However, the intrinsic brittleness of ceramic material limits the application of SiC: It is difficult to fabricate SiC components
with large dimension or complex shapes. Joining technique is a promising way to solve this problem. By achieving SiC/SiC
joints, we can join small SiC components to large ones, which can embroad the application sphere of SiC. Among several
joining methods (brazing, diffusion bonding and self-propagating high-temperature synthesis (SHS) etc.), brazing is widely
used in joining ceramics because of its simplicity, good repeatability and good bonding strength. In the past few decades, Ag-
Cu-Ti is the most commonly used filler alloy to join SiC, but its low melting point limits the using temperature of SiC joints.
Therefore, it’s necessary to develop new filler alloys with high melting points for the sake of improving using temperature of SiC
joints. In this study, Ti-Ni brazing filler was used to join SiC ceramic, the results show that large amount of Ti
2
Ni intermetallic
compounds exits in the brazing seam, which is harmful to mechanical properties of the joints. By adding 15% Zr, the amount
of Ti
2
Ni reduced and eutectic phase generated in brazing seam, which is favorable for mechanical properties. The maximum
shear strength of the joints brazed by Ti-Ni and Ti-Zr-Ni are 80 MPa and 110 MPa, respectively.
Biography
Qin Qi is currently pursuing his PhD in Material Science and Engineering School, Harbin Institute of Technology, China. His research interest is the joining of
ceramic/metal.
qiqinhit@163.comQin Qi et al., J Mat. Sci. 2017, 5:6
DOI: 10.4172/2321-6212-C1-008