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
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arc
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ion
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plating
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alloy
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coating
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a
JIN Zhujing YU Li YU Zhiming DAI Shaoxia XU Jiayin Institute of Corrosion and Protection of Metals
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Academia Sinica
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Corrosion Science Laboratory Academia Sinica
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Shenyang
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China
金属学报(英文版)
The composite coating of(N~++IP)-TiN was prepared by ion-plated TiN film onto ion-nitrided case on the low carbon steel substrate.The microhardness measurement along in- terface between IP-TiN coating and substrate was detected as a moderate decrease in magni- tude with increase of distance from the coating surface.This seems due to the occurrence of ion nitride case,ε-Fe_3N-Fe_2N and Fe_4N phases,along the interface.
关键词:
microhardness
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null
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null
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null
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null
马亚赟
,
郑雅杰
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丁光月
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王俊文
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董俊斐
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张福元
中国有色金属学报
以沉金后液为原料,采用SO2为还原剂,研究在卤素以及卤素复合催化剂存在条件下还原沉金后液中的硒碲以及捕集贵金属金铂钯的工艺.结果表明;在85℃、硫酸浓度167 g/L、SO2流量0.2 L/min的条件下,当Cl-催化剂浓度为1.1 mol/L、反应时间2h,或当Br催化剂浓度为0.5 mol/L、反应时间3h,或当Γ催化剂浓度为0.3 mol/L、反应时间2h时,硒金铂钯还原率达到100％,碲还原率达到99.60％以上.采用卤素复合催化剂,当NaCl与NaBr摩尔比为1∶2时,有助于加快硒碲的还原,而且降低了催化剂的用量.SO2催化还原后产物中含碲74.56％、铜11.85％、硒7.38％,贵金属金3.89％、铂0.19％、钯1.02％(质量分数);还原产物中碲以单质状态存在,产物形貌为球状体.热力学分析表明:硫酸浓度为167 g/L时,Se(Ⅳ)主要以H2SeO3形式存在,Te(Ⅳ)主要以H3TeO3+形式存在;当溶液中有Cl-存在时,溶液中H3TeO3+在Cl-缔合作用下逐渐转变为TeCl62-,其电极电势较H3TeO3+的正,促进碲的还原.
关键词:
SO2
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还原
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卤素离子
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沉金后液
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热力学
杨海
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陆卫中
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李京
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张立新
中国腐蚀与防护学报
使用离子选择性微电极对0.6 mol/L NaC1溶液(60℃)中Na+在一种环氧粉末涂层/Q235钢界面上的传输行为进行了研究,并基于Fick第二定律建立了数学模型.结果表明,实验结果和模型吻合较好,依据模型计算得到的Na+表观扩散系数与前人的结果相符.
关键词:
离子
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涂层/金属界面
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传输
孟军霞
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杨智勇
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杨磊
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马全新
材料导报
采用高温固相法制备样品Lic12Ni0.8Mn0.1Co0.1O2,采用XRD (X-ray diffraction)、SEM(Scanning electron microscope)、CV (Cycle voltammograms)和充放电循环等测试分析了材料的物理化学性质及电化学性能.RD分析表明在合成温度为800℃时,所合成的产物为α-NaFeO2型的层状结构;SEM分析表明在合成温度为800℃时,产物为微小晶粒团聚成的球形颗粒.在40 mA/g和2.5～4.3V的电压范围内,其首次放电比容量为184.1 mAh/g,首次放电效率为85.9％.随着充放电次数的增多,材料的不可逆放电容量逐步减小,循环稳定性增强.循环20周后放电比容量仍能达到171.7 mAh/g,容量保持率为93.260％.测试结果表明,800℃合成的正极材料Li1.12Ni0.8Mn0.1Co0.1O2具有较高的放电比容量和优异的电化学稳定性.
关键词:
锂离子电池
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富镍正极材料
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高温固相法
杨海
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陆卫中
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李京
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张立新
中国腐蚀与防护学报
使用离子选择性微电极对0.6 mol/L NaC1溶液(60℃)中Na+在一种环氧粉末涂层/Q235钢界面上的传输行为进行了研究,并基于Fick第二定律建立了数学模型.结果表明,实验结果和模型吻合较好,依据模型计算得到的Na+表观扩散系数与前人的结果相符.
关键词:
离子
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涂层/金属界面
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传输
