Micropillar Compression of MoSi₂ Single Crystals

Abstract

Deformation behavior of MoSi2 has been studied by micropillar compressions of single crystalline specimens prepared by focused ion beam (FIB) technique as a function of crystal orientation at room temperature. Activation of the {011}<100> and {01$\overline 3$}<331> slip systems were observed in the micropillars compressed along [$\overline 1$10] and [0 15 1], respectively. The CRSS values for each slip system exhibit an approximate power law relationship with the edge length of micropillar. The {01$\overline 3$}<331> slip exhibit much stronger size-dependence than the {011}<100> slip system.

Micropillar compression deformation of single crystals of α-Nb5Si3 with the tetragonal D8l structure

“…4(c) and Table 1. An inverse power-law scaling is applicable for each of the three slip systems as in the cases of many crystalline materials [9][10][11][12][13][14][15][16][17][18][19][33][34][35][36][37]. The power-law exponents n for (001)<010>, {110}<1 1 0> and {0 1 1}<111> slip are estimated to be about 0.43, 0.14 and 0.38, respectively.…”

“…Recently, we have investigated deformation behavior of various materials including hard and brittle materials such as 6H-SiC by utilizing the micropillar compression method [9][10][11][12][13][14][15][16][17][18][19] and have found that plastic deformation indeed occurs in some of these hard and brittle materials even at room temperature when the specimen size becomes smaller down to micrometer scale [10][11][12][16][17][18]. Mo 5 SiB 2 is one of the hard and brittle materials we tested by micropillar compression [17].…”