Friction and wear behavior of sintered magnesium composite reinforced with CNT-Mg2Si/MgO
Friction and wear behavior of sintered magnesium composite reinforced with CNT-Mg2Si/MgO
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DOI：
10.1016/j.msea.2008.10.054
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发表时间：
2009-03-25
期刊：
影响因子：
6.4
通讯作者：
Imai, Hisashi
中科院分区：
文献类型：
--
作者：
Umeda, Junko;Kondoh, Katsuyoshi;Imai, Hisashi
为了改善和评价烧结镁合金材料在干摩擦条件下的磨损性能，探讨了碳纳米管（CNTs）和Mg 2Si/MgO复合增强体对烧结镁合金材料干摩擦条件下摩擦系数和磨损量的影响。原料之一是源自稻壳的无定形和多孔二氧化硅颗粒，其被CNT涂覆并且在孔中含有CNT。通过放电等离子烧结工艺，纯镁和CNT-SiO2复合颗粒的元素混合物通过还原和氧化反应原位合成Mg 2Si和MgO。复合材料与作为对向材料的SUS 304不锈钢球接触时无粘着和粘滑现象，摩擦系数低且稳定。随着CNTs和Mg 2Si含量的增加，烧结镁材料的磨损率降低。摩擦系数与镁合金材料的总磨损量成正比。这是由于Mg 2Si硬质弥散相的防护作用和网状纳米管的自润滑作用共同作用的结果。(C)2008 Elsevier B. V.保留所有权利。
In order to improve and evaluate the wear behavior of the sintered magnesium materials under dry sliding conditions, the effect of carbon nanotubes (CNTs) and Mg2Si/MgO compounds, which were reinforcements of the sintered material, on the friction coefficient and wear loss under dry conditions was discussed. one of the raw materials was amorphous and porous silica particles originated from rice husks, which were coated with CNTs and contained nanotubes in the pores. The in situ synthesis of Mg2Si and MgO via deoxidization and oxidation reaction occurred from the elemental mixture of pure magnesium and CNT-SiO2 composite particles via the spark plasma sintering process. The friction coefficient of the composite material was low and stable because of no adhesion and stick-slip phenomenon in contacting with the SUS304 stainless steel ball as a counter material. The wear rate of sintered magnesium materials decreases in increasing the content of CNTs and Mg2Si. The friction coefficient was proportional to the total wear loss of magnesium materials. These results were due to both of the defensive by hard Mg2Si dispersoids and self-lubricant effect by network nanotubes on the sliding surface. (C) 2008 Elsevier B.V. All rights reserved.