Interfacial microstructure and mechanical property of ZrC-SiC ceramic and Ti6Al4V joint brazed with AgCuTi alloy
Interfacial microstructure and mechanical property of ZrC-SiC ceramic and Ti6Al4V joint brazed with AgCuTi alloy
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DOI：
10.1016/j.jeurceramsoc.2017.02.056
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发表时间：
2017-07
影响因子：
5.7
通讯作者：
J. M. Shi;J. Feng;X. Tian;Haitao Liu;Leijiang Zhang
中科院分区：
文献类型：
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作者：
J. M. Shi;J. Feng;X. Tian;Haitao Liu;Leijiang Zhang
采用AgCuTi合金对ZrC-SiC陶瓷和TC4合金进行钎焊。研究了不同钎焊参数下接头的显微组织和力学性能，并分析了反应机理。结果表明，AgCuTi 和 TC4 中的 Ti 与陶瓷中的 ZrC 反应，形成与 ZrC-SiC 陶瓷相邻的不同形状的 TiC 晶体。随着钎焊温度的升高或保温时间的延长，TC4的溶解变得剧烈，大量的Ti溶入钎料中。结果，由于Cu和Ti之间的强亲和力，Ti与AgCuTi合金中的Cu反应，在钎缝中形成一系列Cu-Ti化合物。 Cu-Ti化合物使钎缝硬度和脆性增加，使钎焊接头性能恶化。在 810 °C 5 分钟下获得的最大剪切强度为 39 MPa。
ZrC-SiC ceramic and TC4 alloy were brazed using AgCuTi alloy. The microstructure and mechanical property of the joints obtained at different brazing parameters were investigated and the reaction mechanism was analyzed. The results indicated that the Ti from the AgCuTi and TC4 reacted with the ZrC in the ceramic to form different shaped TiC crystals adjacent to the ZrC-SiC ceramic. With the increase of brazing temperature or extending of holding time, the dissolution of TC4 became vigorous and much Ti dissolved into the braze alloy. As a result, Ti reacted with the Cu from AgCuTi alloy to form a series of Cu-Ti compounds in the brazing seam due to the strong affinity between Cu and Ti. The Cu-Ti compounds made the hardness and brittleness of brazing seam increase, which deteriorated the property of the brazed joint. The maximum shear strength was 39 MPa obtained at 810 °C for 5 min.