Preparation of TiB2/WC/h-BN Micro-Nano Composite Gradient Self-Lubricating Ceramic Tool Material

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Abstract:

TiB2/WC/h-BN micro-nano composite gradient self-lubricating ceramic tool material was prepared by vacuum hot-pressing technique. The mechanical properties were tested and compared. The best flexural strength, fracture toughness and Vickers hardness of the tool material were 678MPa, 4.75MPa·m1/2 and 15.1GPa, respectively. The microstructure was analyzed by thermal field emission scanning electron microscope (SEM). TiB2 nanoparticles were obviously observed in the ceramic matrix. It suggested that the developed TiB2/WC/h-BN micro-nano composite gradient self-lubricating ceramic tool materials will have potential application in dry machining.

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Key Engineering Materials (Volumes 589-590)

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307-311

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October 2013

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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