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Extended Solubility and Stability in Vapor Quenched Ni3al-X Intermetallics.

Published online by Cambridge University Press:  26 February 2011

Rong Wang
Rong Wang*
Affiliation:
Failure Analysis Associates, Redmond, Washington 98052
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Abstract

A series of fine-grain and amorphous Ni3Al-X alloys, where X is a solute of 1 to 45 at.% Hf, C or Hf+C in continuously graded compositions, was formed simultaneously into a 0.2 mm-thick disk by high-rate sputter co-deposition. The as-deposited Ni3Al-X alloys exhibited a disordered Ll2 structure and extended solid solubility limits beyond which amorphous phases were formed. Heat-treatment of the alloys at 900°C resulted in fine grain size of 0.5 to 1.5 μm. Ultra-fine dispersoids less than 500 Å in size were observed and they seemed resistant to coarsening.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 505
Copyright
Copyright © Materials Research Society 1989

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References

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