Spark plasma sintering of cBN(core)/SiO₂(shell) powder prepared by rotary chemical vapor deposition

Jianfeng Zhang; Hirokazu Katsui; Zhenhua He; Takashi Goto

doi:10.1016/j.jascer.2014.04.001

journal article·2014-09Open access

Spark plasma sintering of cBN(core)/SiO₂(shell) powder prepared by rotary chemical vapor deposition

Jianfeng Zhang, Hirokazu Katsui, Zhenhua He, Takashi Goto

Journal of Asian Ceramic Societies· Volume 2· Issue 3

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Source abstract

Abstract

SiO2 nanolayer coated cubic boron nitride (cBN), cBN(core)/SiO2(shell) powder, was prepared by rotary chemical vapor deposition. The cBN/SiO2 powder was densified by spark plasma sintering at 1873 K for 0.3 ks. The hexagonal boron nitride (hBN) phase was not observed in the cBN–SiO2 composites, indicating that the SiO2 nanolayer depressed the phase transformation from cBN to hBN. The relative density of cBN–SiO2 increased with increasing SiO2 content (CSiO2). The highest hardness of the cBN–SiO2 composite was 17.5 GPa at CSiO2=38 wt% and a load of 0.98 N.

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Research context

Ceramics & glasses Nanomaterials Composites Materials processing

OpenAlex topics: Metal and Thin Film Mechanics · Boron and Carbon Nanomaterials Research · Advanced ceramic materials synthesis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

International Advanced Research and Education Organization, Tohoku University6-3 AramakiAoba-KuSendai 980-8578Japan

College of Mechanics and Materials, Hohai University1-Xikang RoadNanjing 210098China

Institute for Materials Research, Tohoku University2-1-1 KatahiraAoba-KuSendai 980-8577Japan

Funding

Japan Society for the Promotion of Science · Rare Metal Substitute Materials Development Project · New Energy and Industry Technology Development Organization · the Global COE Program ‘Materials Integration · Tohoku University · 111 Project

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