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Phase Equilibria and Ternary Intermetallic Compound with L12 Structure in Co-W-Ga System
- Source :
- Journal of Phase Equilibria and Diffusion. 30:587-594
- Publication Year :
- 2009
- Publisher :
- Springer Science and Business Media LLC, 2009.
-
Abstract
- Phase equilibria and stabilities of intermetallic phases appearing in the Co-rich portion of the Co-W-Ga ternary alloys were investigated and isothermal section diagrams at 1200, 1100, 1000, and 900 °C were determined. A fine cuboidal phase with an L12 structure was observed at 900 and 800 °C, where the composition of the new ternary compound obtained by aging at 900 °C for the Co-7.4W-12.0Ga alloy was Co-11.2W-11.4Ga (at.%). It was confirmed that this compound is metastable at 900 °C but is more stable at 800 °C. These results mean that the thermodynamic stability of the metastable Co3W L12 phase, especially in the low temperature region, increases by the addition of Ga.
Details
- ISSN :
- 18637345 and 15477037
- Volume :
- 30
- Database :
- OpenAIRE
- Journal :
- Journal of Phase Equilibria and Diffusion
- Accession number :
- edsair.doi...........3f9cf820c3a3737d54d29ebb1054784b
- Full Text :
- https://doi.org/10.1007/s11669-009-9580-4