Solid-state amorphization and contamination of NiTa powders during ball-milling

The solid-state amorphization of Na--Ti alloys (Ni sub 75 Ta sub 25 , Ni sub 50 Ta sub 50 ) was successfully accomplished using the high-energy ball-milling process. Although this technique is very effective, the contamination of the amorphous powders from the milling equipment material can be a ser...

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Bibliographic Details
Published in:Scripta metallurgica 1991-02, Vol.25 (2), p.309-313
Main Authors: Merk, Nima, Tanner, Lee E.
Format: Article
Language:English
Subjects:
360101 - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
AMORPHOUS STATE
BINARY ALLOY SYSTEMS
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DISPERSIONS
ENERGY LEVELS
EXCITED STATES
MATERIALS SCIENCE
METALLIC GLASSES
METASTABLE STATES
MICROSTRUCTURE
MIXTURES
NICKEL ALLOYS
POWDERS
PROCESSING
SOLID SOLUTIONS
SOLUTIONS
TANTALUM ALLOYS
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Summary:The solid-state amorphization of Na--Ti alloys (Ni sub 75 Ta sub 25 , Ni sub 50 Ta sub 50 ) was successfully accomplished using the high-energy ball-milling process. Although this technique is very effective, the contamination of the amorphous powders from the milling equipment material can be a serious problem. In the experiments, using WC = Co container and balls led to dispersion of WC particles within the glassy product phase. Cobalt (acting like Ni) entered the glass via SSAR. Characterization of the product glass, and the morphology and distribution of the resultant contamination are covered. Graphs, Diffraction patterns, Photomicrographs. 9 ref.--J.H.
ISSN:0956-716X
0036-9748
DOI:10.1016/0956-716X(91)90184-3