Spark plasma sintering of TiC ceramic with tungsten carbide as a sintering additive |
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Authors: | Lixia Cheng Zhipeng Xie Guanwei Liu |
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Affiliation: | State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China |
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Abstract: | By adding a small amount of tungsten carbide (WC) as sintering aids, nearly fully dense TiC ceramics were obtained by spark plasma sintering at 1450–1600 °C. The results show that the densification temperature of TiC ceramic was significantly decreased with the addition of 3.5 wt% WC. Compared with the monolithic TiC, the densification temperature of TiC–3.5 wt% WC is lower by ~150 °C and no deterioration of mechanical properties is observed. The TiC composite sintered at 1600 °C exhibits full density, a Vickers hardness of 28.2 ± 1.2 MPa, a flexural strength of 599.5 ± 34.7 MPa and a fracture toughness of 6.3 ± 1.4 MPa m1/2. |
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Keywords: | TiC WC Spark plasma sintering Densification Mechanical properties |
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