Jun ZHANG
材料科学技术（英文）
An empirical formula for composition demixing analysis in cathodic arc ion plating using alloy target is established based on the concepts of average charged state and relative demixing parameter. The level of composition demixing effect is presented by demixing degree of one element. For binary constituent alloy target, the composition change trend in coating is discussed and the limit of demixing degree for each element is determined. The content of one element with higher average charged state gets larger in coating than in alloy target, at meantime, the content of one element with lower average charged state gets less. For each one of the two constituents, the less the atom percent in alloy target, the larger the difference of its contents between the coating and the target. For triple constituent alloy target, the content change of one element with moderate average charged state is discussed in detail. Its content in coating getting larger or less is determined by the combination result of the contents of the other two elements in alloy target. For a given content of the element with moderate average charged state in triple alloy target, the content deviation level of that element from coating to alloy target will be not larger than that using binary alloy target containing only that element and one of the two others. According to the wanted coating composition, the composition design of alloy target is easily deduced from the formula.
关键词:
Cathodic arc ion plating
,
arc
,
ion
,
plating
,
alloy
,
coating
,
a
黄乐庆
,
程晓茹
,
龚闯伟
,
付松岳
,
王浩
,
王煜
上海金属
为研究由于复合板生产中元素扩散引起的复合板性能恶化的问题,采用Ni箔作为中间材对碳钢-不锈钢的复合轧制进行研究.对焊接及抽真空后的组坯加热至1 200℃,保温后分4个道次进行轧制,并对添加与未添加中间材Ni的轧后复合界面进行氧化夹杂、组织、成分以及显微硬度检测.试验结果表明,碳钢-不锈钢氧化性夹杂主要由外来引入的连续夹杂和板坯内部残留氧化性气体所引起的点状夹杂组成,且Ni的加入不影响夹杂的成分及数量;中间材Ni能够保证界面结合处足够含量的Ni且有效地抑制C元素的扩散,从而解决了碳钢-不锈钢复合轧制中的“增碳贫铬”问题;中间材Ni的加入还能够有效地避免高硬度Cr的碳化物在复合界面处的形成.
关键词:
中间材Ni
,
复合界面
,
组织
,
成分
