Creation of High Performance Mg Based Composite Containing Nano-Size Al2O3 Particulates as Reinforcement
Creation of High Performance Mg Based Composite Containing Nano-Size Al2O3 Particulates as Reinforcement
复制标题
制备含有纳米 Al2O3 颗粒作为增强材料的高性能镁基复合材料
DOI：
10.4028/www.scientific.net/jmnm.23.151
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Gupta
中科院分区：
文献类型：
--
作者：
S. Hassan;M. Gupta
采用粉末冶金技术制备了2.5wt%纳米Al2O3颗粒增强镁基复合材料。Al2O3颗粒与50 nm的等效尺寸被用作增强。材料的微观结构表征显示，由于纳米Al2O3的存在，再结晶和晶粒细化。力学性能表征表明，纳米Al2O3颗粒增强体的存在显著提高了纯镁的硬度、弹性模量、0.2%屈服强度、抗拉强度和塑性。结果表明，这些材料的比拉伸性能是上级相比，高强度镁合金AZ91增强与高得多的重量百分比的SiC。在本研究中，试图将纳米尺寸的Al2O3颗粒作为增强体的效果与镁的微观结构和力学性能相关联。
Magnesium based composite with 2.5 weight percentage of nano-sized Al2O3 particulates reinforcement was fabricated using powder metallurgy technique. Al2O3 particulates with an equivalent size of 50-nm were used as reinforcement. Microstructural characterization of the materials revealed recrystallization and grain refinement due to the presence of nano-Al2O3. Mechanical properties characterization revealed that the presence of nano-Al2O3 particulates as reinforcement lead to a significant increase in hardness, elastic modulus, 0.2% yield strength and UTS and ductility of pure magnesium. The results revealed that the specific tensile properties of these materials are superior when compared to high strength magnesium alloy AZ91 reinforced with much higher weight percentage of SiC. An attempt is made in the present study to correlate the effect of nano-sized Al2O3 particulates as reinforcement with the microstructural and mechanical properties of magnesium.