超声辅助原位合成Al<sub>2</sub>O<sub>3</sub>颗粒增强铝基复合材料

贾娜姿; 吕书林; 高琦; 吴树森

doi:10.15980/j.tzzz.2014.03.004

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超声辅助原位合成Al₂O₃颗粒增强铝基复合材料
In Situ Synthesized Al₂O₃ Particle Reinforced Al Matrix Composites Assisted with Ultrasonic Treatment
2014年34卷第3期页码：303-306
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.03.004

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[1]贾娜姿,吕书林,高琦,吴树森.超声辅助原位合成Al_2O_3颗粒增强铝基复合材料[J].特种铸造及有色合金,2014,34(03):303-306.

Jia Nazi, Lü Shulin, Gao Qi, et al. In Situ Synthesized Al₂O₃ Particle Reinforced Al Matrix Composites Assisted with Ultrasonic Treatment[J]. Special Casting & Nonferrous Alloys, 2014,34(3):303-306.
[1]贾娜姿,吕书林,高琦,吴树森.超声辅助原位合成Al_2O_3颗粒增强铝基复合材料[J].特种铸造及有色合金,2014,34(03):303-306. DOI： 10.15980/j.tzzz.2014.03.004.

Jia Nazi, Lü Shulin, Gao Qi, et al. In Situ Synthesized Al₂O₃ Particle Reinforced Al Matrix Composites Assisted with Ultrasonic Treatment[J]. Special Casting & Nonferrous Alloys, 2014,34(3):303-306. DOI： 10.15980/j.tzzz.2014.03.004.

摘要

针对Al-CuO反应体系

利用熔体直接反应法

施加间接超声辅助

原位合成了Al2O3颗粒增强铝基复合材料。结果表明

高能超声对Al-CuO体系的原位反应有促进作用

施加超声后自生的Al2O3颗粒直径为1

μm

较未施加超声的数量多

在晶内与晶界弥散分布。间接超声处理的适宜温度为665

75℃

超声后在875℃保温30min有利于Al2O3颗粒生成及弥散分布。高能超声的促进作用主要表现在声空化和声流效应对CuO粉和Al熔体间润湿性的改善以及对团聚CuO粉末的分散

本质是对Al-CuO体系原位反应的热力学与动力学环境的优化。

Abstract

In situ Al2O3 particle reinforced Al matrix composites were synthesized by direct melt reaction assisted with indirect ultrasonic treatment in Al and CuO system.The results show that ultrasonic treatment can promote in situ reaction.With ultrasonic treatment

Al2O3 particles size is about 1

μm in diameter with dispersedly uniform distribution both in the grains and the grain boundaries.Furthermore

the quantity of Al2 O3 particles with ultrasonic treatment is more than that without ultrasonic treatment. The optimal temperature of indirect ultrasonic treatment is about 665

75 ℃.It is beneficial for the dispersed distribution and generation of Al2 O3 particles with holding at 875℃for 30min after ultrasonic treatment.The acoustic streaming effect and acoustic cavitation effect during ultrasonic treatment can improve wettability between Al melt and CuO powder and can disperse the agglomerated CuO powder. The mechanism of the promotion is the optimization of kinetic and thermodynamic environment in the reaction.