The Deposition of Particulate in the In Situ TiB<sub>2</sub> Reinforced Aluminum Matrix Composites

Wang Peng Ma Naiheng Li Xianfeng Wang Haowei

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The Deposition of Particulate in the In Situ TiB₂ Reinforced Aluminum Matrix Composites
Issue 2, Pages: 30-32(2004)
Published： 2004 ，
DOI：

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[1]王鹏,,,,,,,,,马乃恒,,,,,,,,,李险峰,,,,,,,,,王浩伟.原位合成铝基复合材料中颗粒沉降的研究[J].特种铸造及有色合金,2004(02):30-32+2.

Wang Peng Ma Naiheng Li Xianfeng Wang Haowei. The Deposition of Particulate in the In Situ TiB₂ Reinforced Aluminum Matrix Composites. [J]. Special Casting & Nonferrous Alloys (2):30-32(2004)
[1]王鹏,,,,,,,,,马乃恒,,,,,,,,,李险峰,,,,,,,,,王浩伟.原位合成铝基复合材料中颗粒沉降的研究[J].特种铸造及有色合金,2004(02):30-32+2. DOI：

Wang Peng Ma Naiheng Li Xianfeng Wang Haowei. The Deposition of Particulate in the In Situ TiB₂ Reinforced Aluminum Matrix Composites. [J]. Special Casting & Nonferrous Alloys (2):30-32(2004) DOI：

摘要

对混合盐法制备原位TiB2 颗粒增强铝基复合材料进行了研究。试验发现当TiB2 颗粒含量较高 [w（TiB2 ） >8% ]时

出现组织恶化的现象。从颗粒团聚、偏聚及沉降的角度

系统地分析了产生此种现象的原因。通过界面活性元素Mg的适量加入

改善TiB2 颗粒与Al液界面的润湿情况

阻止了颗粒的团聚 ;通过改善工艺参数

利用快速搅拌技术

有效地抑制了颗粒的偏聚与沉降

Abstract

The in-situ TiB 2 particulate reinforced Al matrix comp osites by mixing-salts reaction were studied. The experimental results showed t hat the microstructure and properties of the composites were wosern with a highe r mass fraction of TiB 2 particulate[w（TiB 2）>8% ]. The mechanism was analyzed systemically from the view of TiB 2 particulate coagulation

segregation and deposition. Th e active Mg addition can improve TiB 2 particulate wettability between and molt en aluminum alloy preventing particulates from coagulation. The segregation and dep osition of t he particulate were restrained effectively with improvement of processing parame ters including high-speed stirring and rapid solidification.