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Pressureless sintering of titanium carbide doped with boron or boron carbide
Gu, Yifeng1,2; Liu, Ji-Xuan3; Xu, Fangfang1; Zhang, Guo-Jun3
2017
Source PublicationJournal of the European Ceramic Society
ISSN09552219
Volume37Issue:2Pages:539-547
AbstractTitanium carbide ceramics with different contents of boron or B4C were pressureless sintered at temperatures from 2100 °C to 2300 °C. Due to the removal of oxide impurities, the onset temperature for TiC grain growth was lowered to 2100 °C and near fully dense (>98%) TiC ceramics were obtained at 2200 °C. TiB2platelets and graphite flakes were formed during sintering process. They retard TiC grains from fast growth and reduced the entrapped pores in TiC grains. Therefore, TiC doped with boron or B4C could achieve higher relative density (>99.5%) than pure TiC (96.67%) at 2300 °C. Mechanical properties including Vickers’ hardness, fracture toughness and flexural strength were investigated. Highest fracture toughness (4.79 ± 0.50 MPa m1/2) and flexural strength (552.6 ± 23.1 MPa) have been obtained when TiC mixed with B4C by the mass ratio of 100:5.11. The main toughening mechanisms include crack deflection and pull-out of TiB2platelets. © 2016 Elsevier Ltd
DOI10.1016/j.jeurceramsoc.2016.08.035
EI Accession Number20164402957591
EI KeywordsBoron carbide
EI Classification Number461.9 Biology - 804.2 Inorganic Compounds - 812.1 Ceramics - 933.1.2 Crystal Growth - 951 Materials Science
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25408
Collection中国科学院上海硅酸盐研究所
Affiliation1.The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China;
3.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Research Institute of Functional Materials, Donghua University, Shanghai; 201620, China
Recommended Citation
GB/T 7714
Gu, Yifeng,Liu, Ji-Xuan,Xu, Fangfang,et al. Pressureless sintering of titanium carbide doped with boron or boron carbide[J]. Journal of the European Ceramic Society,2017,37(2):539-547.
APA Gu, Yifeng,Liu, Ji-Xuan,Xu, Fangfang,&Zhang, Guo-Jun.(2017).Pressureless sintering of titanium carbide doped with boron or boron carbide.Journal of the European Ceramic Society,37(2),539-547.
MLA Gu, Yifeng,et al."Pressureless sintering of titanium carbide doped with boron or boron carbide".Journal of the European Ceramic Society 37.2(2017):539-547.
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