Open AccessEffect of WC/Co coherency phase boundaries on Fracture toughness of the nanocrystalline cemented carbides
Author(s) -
Hongxian Xie,
Xiaoyan Song,
Fuxing Yin,
Yongguang Zhang
Publication year - 2016
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/srep31047
Subject(s) - nanocrystalline material , carbide , materials science , fracture toughness , cemented carbide , phase (matter) , toughness , fracture (geology) , composite material , nanotechnology , chemistry , organic chemistry
The effect of coherency WC/Co phase boundaries on the fracture toughness of the nanocrystalline WC-Co cemented carbides is studied by MD simulation method. The simulation results show that the nanocrystalline WC-Co cemented carbides with coherency WC/Co phase boundaries has higher fracture toughness than that without coherency WC/Co phase boundaries. Moreover, the mechanism of why coherency WC/Co phase boundaries can improve the fracture toughness of the nanocrystalline cemented carbides is also investigated. It is found the fact that the separation energy of the coherent WC/Co phase boundary is larger than that of the incoherent WC/Co phase boundaries is the main reason for this excellent mechanical property.