材料工程Issue(12)：73-77,5.
Mg-Mg2Si-MgO复合材料的反应自组织合成机理
Reaction Mechanism in Self-assembly Growth Formation of Mg-Mg2Si-MgO Composites
金莹 1郎静 2陈禧 1朱聪旭 1马南钢1
作者信息
- 1. 华中科技大学材料成形与模具技术国家重点实验室,武汉430074
- 2. 华中科技大学能源与动力工程学院,武汉430074
- 折叠
摘要
Abstract
With pure Mg and SiO2 powders as raw materials, an Mg-based metal matrix composite reinforced by MgO ceramic and Mg2Si intermetallic was formed through self-assembly growth method. The differential thermal analysis (DTA) was performed on the samples and it was revealed that the in-situ reaction between Mg and SiO2 took place from 510℃ to 600℃. As a result of reaction, the MgO was formed, and the reduced Si continually reacted with excess Mg, forming Mg2Si. The observation of scanning electron micrograph and energy dispersive spectrometry indicated that, in the sample made by ultrasonic assisted stirring, the in-situ formed MgO covered the Mg2Si intermetallic as a compact aggregate layer which had a strong bonding strength with the matrix. What's more,the Vickers hardness tests showed that the Vickers hardness of ultrasonic assisted stirring sample was 40 percent higher than that of the sample made by generally stirring. The reaction mechanism between Mg and SiO2 was concretely discussed.关键词
镁基复合材料/反应自组织合成/超声波辅助电搅拌/生长机理/反应模型Key words
magnesium-based matrix composite/self-assembly growth/ultrasonic assisted stirring/growth mechanism/reaction model分类
通用工业技术引用本文复制引用
金莹,郎静,陈禧,朱聪旭,马南钢..Mg-Mg2Si-MgO复合材料的反应自组织合成机理[J].材料工程,2011,(12):73-77,5.
