Fabrication of TiB2/TiC Composites by Spark Plasma Sintering

doi:10.3724/SP.J.1077.2012.11672

Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (9): 961-964.DOI: 10.3724/SP.J.1077.2012.11672

• Research Paper • Previous Articles Next Articles

Fabrication of TiB₂/TiC Composites by Spark Plasma Sintering

MA Zhi-Qiang¹, JI Ying-Hu², WANG Lian-Jun¹

(1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China; 2. AVIC, Xi’an Flight Automatic Control Research Institute, Xi’an 716005, China)

Received:2011-10-27 Revised:2011-12-12 Published:2012-09-20 Online:2012-08-28
About author:MA Zhi-Qiang. E-mail: mazhiqiang0501@126.com
Supported by:
Shanghai Leading Academic Discipline Project (B603); Aeronautical Science Foundation of Aviation Key Laboratory of Science and Technology on Inertia (201108M2001); Program for New Century Excellent Talents in University (NCET-10-0323); “Shu Guang” project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (11SG34); The Fundamental Research Funds for the Central Universities

Abstract

Abstract: TiB₂/TiC composites were in situ fabricated through spark plasma sintering (SPS) technique using Ti and B₄C powders as starting materials. The phase constituent of the samples was analyzed by X-ray diffraction techniques and microstructures were observed by scanning electron microscope. The Vickers hardness, fracture toughness and MSP strength at room temperature was measured by indentation method and Modified Small Punch (MSP) test. The results showed that the TiB₂/TiC composite fabricated by one-step sintering (sintering at 1550℃ for 6 min) has an average grain size greater than 1 μm with MSP strength of 844 MPa. While the TiB₂/TiC composite with an average grain size of about 200 nm could be fabricated by two-step sintering (at higher sintering temperature of 1550℃ and lower holding temperature of 1450℃) and its MSP strength reached as high as 1095 MPa.

Key words: in situ reactive sintering, composite, MSP Strength, two-step sintereing

CLC Number:

TQ174

MA Zhi-Qiang, JI Ying-Hu, WANG Lian-Jun. Fabrication of TiB₂/TiC Composites by Spark Plasma Sintering[J]. Journal of Inorganic Materials, 2012, 27(9): 961-964.

References

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Fabrication of TiB₂/TiC Composites by Spark Plasma Sintering

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