Microstructural evolution of Mo-Si-B ternary alloys through heat treatment at 1800°C

Kyosuke Yoshimi, Seong Ho Ha, Kouichi Maruyama, Rong Tu, Takashi Goto

研究成果: Article

9 引用 (Scopus)

抜粋

First of all, the as-cast microstructures of Mo-rich Mo-Si-B ternary alloys were investigated around the triple junction point of the primary Mo solid solution, Mo5SiB2 and Mo2B in this work, based on the liquidus projections of the Mo-Si-B system which have been reported in earlier studies. Subsequently, their microstructural evolution through heat treatment was investigated. Since Mo2B crystallizes out during solidification into a primary or secondary phase even though the alloy composition lies in the triangle of Mo-Mo5SiB2-Mo3Si in the Mo-Si-B equilibrium phase diagram, the as-cast microstructures include the non-equilibrated Mo 2B in wide compositional ranges. However, Mo2B was completely decomposed during heat treatment at 1800 °C for 24 h and this contributed to the development of homogeneous, fine microstructures. On the other hand, since Mo2B was not decomposed perfectly during 24 h of 1600 °C heat treatment, as-cast microstructures largely remained. Therefore, it is realized that the heat treatment at 1800 °C is necessary to obtain well-developed microstructures of Mo-Si-B alloys.

元の言語English
ページ(範囲)527-532
ページ数6
ジャーナルAdvanced Materials Research
278
DOI
出版物ステータスPublished - 2011 7 4

ASJC Scopus subject areas

  • Engineering(all)

フィンガープリント Microstructural evolution of Mo-Si-B ternary alloys through heat treatment at 1800°C' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用