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采用46.4%Ag-18.0%Cu-35.6%Ni(质量分数)复合粉末中间层实现了SiO_2陶瓷和TC4钛合金的良好钎焊。使用扫描电镜、能谱分析和X射线衍射等方法对钎焊接头的界面组织和力学性能进行了研究。结果表明,SiO_2陶瓷和TC4钛合金的连接接头成形良好,SiO_2陶瓷/Ag-Cu/Ni/TC4钛合金钎焊接头的界面结构为:SiO_2/Ti_4O_7+TiSi_2/Ti_2Cu+Ti_2Ni/α-Ti+Ti2Cu+Ti_2Ni过共晶组织/α-Ti+Ti_2Cu+Ti_2 Ni过共析组织/α-Ti/TC4。当钎焊温度为970℃、保温时间为30 min时,使用Ag-Cu/Ni粉末中间层钎焊SiO_2陶瓷与TC4钛合金的接头达到最高抗剪强度38 MPa。
Good brazing of SiO 2 ceramic and TC 4 titanium alloy was achieved by using 46.4% Ag-18.0% Cu-35.6% Ni (mass fraction) composite powder interlayer. The interface microstructure and mechanical properties of the brazed joints were studied by scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The results show that the joints of SiO 2 ceramic and TC 4 titanium alloy are well formed. The interface structure of SiO 2 / Ti 4 O 7 + TiSi 2 / Ti 2 Cu + Ti 2 Ni / α-Ti + Ti 2 Cu + Ti_2Ni hypereutectic structure / α-Ti + Ti_2Cu + Ti_2 Ni hypereutectoid structure / α-Ti / TC4. When the brazing temperature is 970 ℃ and the holding time is 30 min, the maximum shear strength of 38 MPa is achieved by brazing the joint of SiO_2 ceramic and TC4 titanium alloy with Ag-Cu / Ni powder interlayer.