Nanoscale TiB precipitates in laser deposited Ti-matrix composites

被引：141

作者：

Banerjee, R ^{[1
]}

Genç, A ^{[1
]}

Hill, D ^{[1
]}

Collins, PC ^{[1
]}

Fraser, HL ^{[1
]}

机构：

[1] Ohio State Univ, Ctr Accelerated Maturat Mat, Dept Mat Sci & Engn, Columbus, OH 43210 USA

来源：

SCRIPTA MATERIALIA | 2005年 / 53卷 / 12期

关键词：

titanium boride; metal-matrix composites; laser deposition; rapid solidification; nanometer precipitates;

D O I：

10.1016/j.scriptamat.2005.08.014

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Metal-matrix composites based on boride reinforcements in a titanium base matrix have been deposited in situ from a powder feed-stock consisting of a blend of Ti-alloy and elemental boron powders using the laser engineered net-shaping (LENS (TM)) process. These composites exhibit a homogeneous multi-scale microstructure consisting of micron to sub-micron as well as nanometer scale TiB precipitates in a metal matrix. While the coarser precipitates result from rapid solidification of the liquid, the nanometer-scale precipitates are likely to form from the solid-state decomposition of a boron supersaturated Ti-base matrix. Such nanometer-scale TiB precipitates call play a prominent role in determining the mechanical properties of these composites. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1433 / 1437

页数：5

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