Amorphous metal alloys produced by mechanical alloying
Mechanical alloying is a powder metallurgy method used in commercial production of high temperature superalloys. Under specific conditions, mechanical alloying allows the synthesis of amorphous metal alloys from mixtures of pure metal powders or from the powders of intermetallic compounds. Because the amorphizing transformation during mechanical alloying is a solid state reaction, most of the difficulties related to the amorphization by rapid solidification of melts can be avoided. Mechanical alloying allows the synthesis of amorphous alloys from metals with high melting temperatures and the resulting alloys have interesting properties such as high hardness and high crystallization temperatures. We used mechanical alloying for the synthesis of amorphous alloys in the binary alloy systems Nl-Sn, Nb-Si and Al-Hf. The amorphous alloy powders were characterized by x-ray diffraction, differential scanning calorimetry, scanning and transmission electron microscopy and hardness measurements. Produced alloys were compacted by hot pressing and the obtained compacts were characterized by x-ray diffraction, density and hardness measurements and by optical and scanning electron microscopy. The results of the amorphization and compaction studies are presented and discussed together with the characteristics of the mechanical alloying process. 15 refs., 5 figs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6267721
- Report Number(s):
- LA-UR-89-1208; CONF-8905131-1; ON: DE89011189
- Resource Relation:
- Conference: 5. Scandinavian symposium on materials science, Copenhagen, Sweden, 22 May 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM ALLOYS
SYNTHESIS
HAFNIUM ALLOYS
NICKEL BASE ALLOYS
NIOBIUM BASE ALLOYS
SILICON ALLOYS
TIN ALLOYS
AMORPHOUS STATE
BINARY ALLOY SYSTEMS
CRYSTALLIZATION
MICROSTRUCTURE
POWDER METALLURGY
X-RAY DIFFRACTION
ALLOY SYSTEMS
ALLOYS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
METALLURGY
NICKEL ALLOYS
NIOBIUM ALLOYS
PHASE TRANSFORMATIONS
SCATTERING
360101* - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies