Open AccessPressureless densification and properties of TiB 2 –B 4 C composite ceramics with Ni as additives
Author(s) -
Ma Li,
Yu Jincheng,
Guo Xue,
Zhang Yujun,
Gong Hongyu
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0709
Subject(s) - materials science , boron carbide , composite number , flexural strength , fracture toughness , titanium diboride , ceramic , sintering , relative density , composite material , thermal conductivity , boron , chemistry , organic chemistry
Titanium diboride–boron carbide (TiB 2 –B 4 C) composite ceramics were prepared using different amounts of Ni as sintering aids by pressureless sintering at 2100°C for 60 min under an argon atmosphere. This study focused on the effects of different amounts of Ni as additives on densification and mechanical and thermal properties of TiB 2 –B 4 C composite ceramics. Results showed that the relative density, hardness, flexural strength and thermal conductivity of obtained composite ceramics with 1.3 wt% Ni addition were 98%, 20.4 GPa, 330 MPa and 30 W/m K, respectively. However, fracture toughness was 6 MPa m 1/2 when the content of Ni was fixed at 2.2 wt%.