A study on microstructure development and oxidation phenomenon of arc consolidated Mo-Nb-Si-(Y) alloys

被引：2

作者：

Majumdar, Sanjib ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Mat Proc & Corros Engn Div, High Temp Mat Dev Sect, Bombay 400085, Maharashtra, India

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2019年 / 78卷

关键词：

High-temperature materials; Molybdenum silicides; Electron back scattered diffraction; Oxidation; Oxide scale; MO-SI-B; MECHANISMS; RESISTANCE; BEHAVIOR;

D O I：

10.1016/j.ijrmhm.2018.08.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two alloys of compositions Mo-26Nb-19Si and Mo-26Nb-19Si-0.5Y (at.%) were prepared by non-consumable arc melting. The alloys characterized using BSE, EDS and EBSD techniques confirmed the formation of two phase (Mo, Nh)(SS)-(Mo, Nb)(5)Si-3 microstructures. Y-rich (Y2O3) particles were mainly found to be present at the inter phase boundaries creating different phase morphologies in Mo-26Nb-19Si-0.5Y alloy. Both the phases showed a preferred orientation indicating a directional growth during solidification. Oxidation tests conducted in air at 1000 and 1300 degrees C showed a porous oxide scale formation on the alloy surface and loss of material due to evaporation of MoO3. The detailed SEM-EDS analysis of the oxide scale formed on these alloys in argon environment at 1000 degrees C, indicated the presence of Nb2O5 particles in the silica (SiO2) matrix.

引用

页码：76 / 84

页数：9

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