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Interfacial features and interfacial thermal conductivity of three kinds of metal matrix composites (MMC) have been comparatively studied by the scanning thermal probing with the micro-sized special resolution. The statistical method was used to process and translate topographic and thermal voltage data of scamming thermal microscopy (SThM). The data of interfacial width and interfacial thermal conductivity were obtained. The results reveal that the macro thermal conductivity of the MMC can be critically dependent on the reinforcing-matrix interfacial thermal conductivity-.
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