Nanophase metallic alloys consolidated from powders prepared by mechanical alloying

被引：18

作者：

He, L ^{[1
]}

Ma, E ^{[1
]}

机构：

[1] LOUISIANA STATE UNIV,DEPT MECH ENGN,MAT SCI & ENGN LAB,BATON ROUGE,LA 70803

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 204卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

metallic alloys; powders; mechanical alloying; consolidation;

D O I：

10.1016/0921-5093(95)09968-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanocrystalline metals and intermetallic compounds (Fe, Fe3Al, Ni3Al) have been prepared by mechanical alloying of elemental powders. This simple and inexpensive route yielded sufficient quantity of powders for consolidation experiments to produce bulk nanophase samples. By employing high pressure, relatively low temperature, and protective Ar atmosphere during hot pressing/forging, mechanically-alloyed nanophase metallic alloy powders have been consolidated to near full density (greater than or equal to 91% of theoretical density) with average grain sizes maintained to below about 20 nm. Contamination of oxygen and carbon in consolidated samples was below about 2 at.% in iron and about 1 at.% in intermetallics. Further improvement of processing steps to achieve full density and reduce contamination is discussed.

引用

页码：240 / 245

页数：6

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