TY - JOUR
T1 - Control of residual stresses in 2Si-B-3C-N and Nb joints by the Ag-Cu-Ti + Mo composite interlayer
AU - Pan, Rui
AU - Kovacevic, Sasa
AU - Lin, Tiesong
AU - He, Peng
AU - Sekulic, Dusan P.
AU - Mesarovic, Sinisa Dj
AU - Yang, Zhihua
AU - Shen, Yanxu
AU - Wei, Hongmei
N1 - Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/6/5
Y1 - 2016/6/5
N2 - 2Si-B-3C-N ceramic was successfully vacuum brazed to Nb. Brazing was executed at 850 °C for 10 min using Ag-Cu-Ti/Mo/Ag-Cu-Ti composite interlayer. Effects of the Mo interlayer thickness within the composite interlayer on the microstructure of the joint and its shear strength were investigated. In joints brazed without Mo and with 50 μm Mo interlayer a continuous through cracks propagated within the ceramic during cooling. However, no cracks were found in joints when Mo interlayers thicker than 100 μm were used. The improvement of the shear strength with an increase in the thickness of Mo interlayer within the composite interlayer was achieved. To explain the effects of the Mo layer thickness, detailed FEM simulations of the cooling process were performed. The analysis of the residual stress is consistent with the observed joint strengthening and crack propagation.
AB - 2Si-B-3C-N ceramic was successfully vacuum brazed to Nb. Brazing was executed at 850 °C for 10 min using Ag-Cu-Ti/Mo/Ag-Cu-Ti composite interlayer. Effects of the Mo interlayer thickness within the composite interlayer on the microstructure of the joint and its shear strength were investigated. In joints brazed without Mo and with 50 μm Mo interlayer a continuous through cracks propagated within the ceramic during cooling. However, no cracks were found in joints when Mo interlayers thicker than 100 μm were used. The improvement of the shear strength with an increase in the thickness of Mo interlayer within the composite interlayer was achieved. To explain the effects of the Mo layer thickness, detailed FEM simulations of the cooling process were performed. The analysis of the residual stress is consistent with the observed joint strengthening and crack propagation.
KW - Brazing
KW - Composite interlayer
KW - Mo
KW - Residual stress
KW - Si-B-C-N ceramic
UR - http://www.scopus.com/inward/record.url?scp=84962858089&partnerID=8YFLogxK
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U2 - 10.1016/j.matdes.2016.03.072
DO - 10.1016/j.matdes.2016.03.072
M3 - Article
AN - SCOPUS:84962858089
SN - 0264-1275
VL - 99
SP - 193
EP - 200
JO - Materials and Design
JF - Materials and Design
ER -