Room-temperature deformation of single crystals of ZrB2 and TiB2 with the hexagonal AlB2 structure investigated by micropillar compression.
Sci Rep
; 11(1): 14265, 2021 Jul 12.
Article
em En
| MEDLINE
| ID: mdl-34253780
ABSTRACT
The plastic deformation behavior of single crystals of two transition-metal diborides, ZrB2 and TiB2 with the AlB2 structure has been investigated at room temperature as a function of crystal orientation and specimen size by micropillar compression tests. Although plastic flow is not observed at all for their bulk single crystals at room temperature, plastic flow is successfully observed at room temperature by the operation of slip on {1[Formula see text]00}<11[Formula see text]3> in ZrB2 and by the operation of slip on {1[Formula see text]00}<0001> and {1[Formula see text]00}<11[Formula see text]0> in TiB2. Critical resolve shear stress values at room temperature are very high, exceeding 1 GPa for all observed slip systems; 3.01 GPa for {1[Formula see text]00}<11[Formula see text]3> slip in ZrB2 and 1.72 GPa and 5.17 GPa, respectively for {1[Formula see text]00}<0001> and {1[Formula see text]00}<11[Formula see text]0> slip in TiB2. The identified operative slip systems and their CRSS values are discussed in comparison with those identified in the corresponding bulk single crystals at high temperatures and those inferred from micro-hardness anisotropy in the early studies.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Sci Rep
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Japão