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对攀钢铁水中常见元素Si,Mn,V,Ti对Ga的活度的影响进行了研究,测定出了它们之间的相互作用系数。通过研究Fe-Ga-X-O平衡计算了e^xGa。 相似文献
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本文介绍一种复合自润滑耐磨带材的研制及其性能。该材料是以金属网为骨架,以聚四氟乙烯和石墨为主要润滑减磨组份,以硅酸盐粉末为主要耐磨组份,并加适量的六氟丙烯为增强亲合剂的自润滑衬套材料。它采用特定的工艺条件制成,具有良好润滑性、耐磨性、导热性、耐蚀性和尺寸稳定性,而且拆装方便、不污染产品和环境,使用寿命长,适用于纺织、食品、印刷等轻工业机械,也可用于飞机、汽车等制造工业,作为-50-250℃条件下的 相似文献
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Tribological Property of Polyimide Porous Materials 总被引:1,自引:1,他引:0
Polyi mide(PI)is a kind of macromolecule mate-rial developed since the1950s,having superior physi-cal mechanical properties,resistance to hightempera-ture,resistance to acid and alkali,and excellent selflubricating property.Hence,it is widely applied inhigh and new-technology fields,such as the militaryindustry,electronic industry and aerospace indus-try[1].However,in the current research on the fric-tion performance of PI materials,the most concernedtopic is PI fil m materials,and it is sel… 相似文献
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Based on a series of experiments, the theory of relationship between normal pressure and pores' characters fit for polymer was set up for the first time. On the study of relation between normal pressure and porosity, experience model of polyimide porous materials was proposed which is similar to the traditional expe- rience model of the metal porous material. While being pressed, polyimide was found soon to come into elasto- plastic deformation progress in this paper, so the theory model of metal porous material based on Hooker's law was not fit for the polymer any more. A new elasto-plastic deformation and exhausting model is proposed which shows better agreement with polymer material's pressing process. 相似文献
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