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Yuzhen ZHAO , Yongping LEI , Yaowu SHI , null , null
材料科学技术(英文)
A 3D mathematical model is developed to calculate the temperature and velocity distributions in a moving gas tungsten arc (GTA) welding pool with different sulfur concentrations. It has been shown that, the weld penetration increases sharply with increasing sulfur content. When sulfur content increa...
关键词: Surface-active elements , null , null , null
马海龙 , 王英勇 , 靳国强 , 郭向云
新型炭材料 doi:10.1016/S1872-5805(08)60031-1
以甲苯为碳源,二茂铁为催化剂,噻吩为生长促进剂,通过化学气相沉积方法得到了多分叉结构的炭.借助SEM、XRD和EDX考察了硫元素对产物的形貌和微观结构的影响.结果表明,当甲苯中的噻吩体积分数在0.01%~1%变化时,产物形貌由树状逐渐衍变为分支状.树状炭南较长而笔直的多分叉炭纤维构成,而分支状炭则由...
关键词: 形貌衍变 , 分支状炭 , 硫 , 化学气相沉积