Optimizing Wear Resistance via Brazing Temperature Adaption: Application into CBN/Cu-Sn-Ti Composites
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Cubic boron nitride (CBN)/Cu-Sn-Ti composites as potential superabrasive products are prepared. It is found that as the temperature increases, porosity keeps decreasing from 1123 K to 1223 K but becomes virtually constant afterward, which is inversely coupled to the reaction layer thickness variation. Weight loss arrives at the minimum value at 1223 K. Deep etching over the interfacial region reveals that TiN and TiB2 compounds have been generated, and their roles in determining wear properties are postulated.
The authors gratefully acknowledge the support from the National Natural Science Foundation of China (51622401, 51861130361, 51861145312, and 51850410522), Newton Advanced Fellowship by the Royal Society (RP12G0414), Research Fund for Central Universities (N172502004), National Key Research and Development Program of China (2016YFB0300602), and Global Talents Recruitment Program endowed by the Chinese Government for their financial support. We also thank State Key Laboratory of Solidification Processing, Northwestern Polytechnical University (SKLSP201805).