Abstract
Reinforcement surface modification is often used to improve the mechanical properties of particle-reinforced metal matrix composites, however, the extent to which such modifications affect the interfacial properties is yet to be revealed. In this study, we fabricated SiC-Al composite bilayers where the SiC underwent different surface treatments before Al deposition. Four-point bending tests showed that the samples made from acid-pickled and thermally oxidized SiC possessed substantially higher interfacial toughness than their untreated counterpart, a presumption inferred from mechanical tests on bulk SiCp-Al composites but never justified quantitatively. These findings were rationalized by the different interfacial constituents and structure in these samples.
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The authors would like to acknowledge the financial support of the National Basic Research Program (973 Program, No. 2012CB619600), the Natural Science Foundation of China (Nos. 51131004, 51471190), and the Science & Technology Committee of Shanghai Municipality (Nos. 15JC1402100, 14DZ2261200, 14520710100). Y. K. and Q.G. would like to acknowledge X. Tian for the help with the four-point bending test. S. Feng is acknowledged for part of the TEM sample preparation.
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Manuscript submitted April 27, 2016.
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Kong, Y., Guo, Q., Guo, X. et al. Correlation Between Interfacial Structure and Toughness in SiC-Al Bilayers. Metall Mater Trans A 47, 4800–4805 (2016). https://doi.org/10.1007/s11661-016-3684-3
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DOI: https://doi.org/10.1007/s11661-016-3684-3