Effect of elemental powder blending ratio on combustion foaming behavior of porous Al-Ti intermetallics and Al3Ti/Al composites

被引：23

作者：

Kobashi, Makoto ^{[1
]}

Inoguchi, Norio ^{[1
]}

Kanetake, Naoyuki ^{[1
]}

机构：

[1] Nagoya Univ, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

INTERMETALLICS | 2010年 / 18卷 / 05期

关键词：

aluminides; miscellaneous; composites; powder metallurgy; including consolidation; reaction synthesis; automotive uses; including engines (and other transportation uses); MICROSTRUCTURAL EVOLUTION; ALUMINUM; TEMPERATURE; PARAMETERS; STABILITY; EXPANSION;

D O I：

10.1016/j.intermet.2010.01.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Porous Al-Ti intermetallics and Al3Ti/Al composites were fabricated by combustion foaming process. Fundamentally, aluminum and titanium powders were blended (Al/Ti mole blending ratios ranging from 0.33 to 10.0). Additionally, boron carbide (B4C) powder was blended as exothermic agent since the heat of TiC and TiB2 formation is much higher than those of Al-Ti intermetallics. The blended powder compact was heated to induce the combustion reaction. Isotropic closed pores were produced by this process. By adding 10 vol.% exothermic agent, the porosity exceeded 60% in a wide range of Al/Ti ratios (3.0-10.0). It was confirmed that high heat of reaction of exothermic agent assisted the complete conversion of aluminum and titanium powders to Al3Ti. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1039 / 1045

页数：7

共 37 条

[1]

The effect of compaction method on the expansion and stability of aluminium foams [J].