Room-temperature deformation of single crystals of ZrB2 and TiB2 with the hexagonal AlB2 structure investigated by micropillar compression

Zhenghao Chen, Bhaskar Paul, Sanjib Majumdar, Norihiko L. Okamoto, Kyosuke Kishida, Haruyuki Inui, Shigeki Otani

研究成果: Article査読

2 被引用数 (Scopus)


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 {11 ¯ 00}<112 ¯ 3> in ZrB2 and by the operation of slip on {11 ¯ 00}<0001> and {11 ¯ 00}<112 ¯ 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 {11 ¯ 00}<112 ¯ 3> slip in ZrB2 and 1.72 GPa and 5.17 GPa, respectively for {11 ¯ 00}<0001> and {11 ¯ 00}<112 ¯ 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.

ジャーナルScientific reports
出版ステータスPublished - 2021 12

ASJC Scopus subject areas

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「Room-temperature deformation of single crystals of ZrB<sub>2</sub> and TiB<sub>2</sub> with the hexagonal AlB<sub>2</sub> structure investigated by micropillar compression」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。