Development of magnesium/(yttria + nickel) hybrid nanocomposites using hybrid microwave sintering: Microstructure and tensile properties
Development of magnesium/(yttria + nickel) hybrid nanocomposites using hybrid microwave sintering: Microstructure and tensile properties
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DOI：
10.1016/j.jallcom.2009.07.117
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发表时间：
2009-11
影响因子：
6.2
通讯作者：
K. Tun;M. Gupta
中科院分区：
文献类型：
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作者：
K. Tun;M. Gupta
在本研究中，强调了混杂增强(陶瓷+金属)方法在提高镁材料拉伸响应方面的作用。采用粉末冶金与微波烧结相结合的加工工艺。在前人研究的基础上，选择了Mg/0.7vol.%Y2O3型纳米复合材料作为主要参照点。用0.3-1.0vol.%的纳米镍颗粒杂化了纳米Y2O3光催化剂。拉伸结果表明，与纯镁和镁/0.7Y_2O_3相比，Mg/(Y_2O_3+Ni)杂化纳米复合材料的YS和UTS增加了0.2%。与镁和镁/0.7Y_2O_3相比，镁/(0.7Y_2O_3+0.6Ni)纳米复合材料的强度(0.2%YS和UTS)和平均塑性同时提高。这项研究的重点是强调金属和陶瓷混合增强体在适量使用时改善镁的整体拉伸响应的能力。
In the present study, the role of hybrid reinforcement (ceramic+metal) methodology to enhance the tensile response of magnesium is highlighted. Powder metallurgy incorporating microwave sintering was used as the processing technique. Mg/0.7vol.%Y2O3nanocomposite was chosen as main reference point based on earlier studies. Nickel nanoparticulates in the range of 0.3–1.0vol.% were used to hybridize the nanosize Y2O3reinforcement. Tensile results revealed an increase in 0.2% YS and UTS of Mg/(Y2O3+Ni) hybrid nanocomposites when compared to pure Mg and Mg/0.7Y2O3. Mg/(0.7Y2O3+0.6Ni) nanocomposite showed a simultaneous improvement in both strengths (0.2%YS and UTS) and average ductility when compared to Mg and Mg/0.7Y2O3. Emphasis is placed in this study to highlight the capability of metallic and ceramic hybrid reinforcements to improve overall tensile response of magnesium when used in right amounts.