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In this study, it was reported a novel approach for joining Cf/Al composites and TiAl intermetallic by selfpropagating high-temperature synthesis(SHS). Mixed powders of 14Al–2Ni–3CuO were used as the SHS interlayer, and differential thermal analysis test of Al–Ni–CuO interlayer was conducted to analyze the exothermic characteristic. Sound joint was got by SHS joining under the conditions of 600 °C, 30 min, and 5 MPa. The joint was characterized by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS), and X-ray diffraction(XRD). TiAl3 and NiAl3 are, respectively, formed in the TiAl/interlayer and Cf/Al/interlayer interfaces. Reaction products of Ni2Al3, NiAl3, Al2O3, and Cu were observed in the interlayer. And the formation mechanism of SHS joining was investigated.
In this study, it was reported a novel approach for joining Cf / Al composites and TiAl intermetallic by selfpropagating high-temperature synthesis (SHS). Mixed powders of 14Al-2Ni-3CuO were used as the SHS interlayer, and differential thermal analysis test of Al-Ni-CuO interlayer was conducted to analyze the exothermic characteristic. The joint was obtained by SHS joining under the conditions of 600 ° C, 30 min, and 5 MPa. The joint was characterized by scanning electron microscopy (SEM), energy dispersive TiAl3 and NiAl3 were formed in the TiAl / interlayer and Cf / Al / interlayer interfaces. Reaction products of Ni2Al3, NiAl3, Al2O3 and Cu were observed in the interlayer. And the formation mechanism of SHS joining was investigated.