Preparation and characterization of molybdenum powders with copper coating by the electroless platin

来源 :Rare Metals | 被引量 : 0次 | 上传用户:cool_bl
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Molybdenum powders with a diameter of approximately 3 μm were coated with copper using the electroless plating technique in the pH 12.5-13 and temperature range of 55-75°C. The optimization of the electroless copper bath was evaluated through the combination of process parameters like pH and temperature. The optimized values of pH and temperature were found to be 12.5 and 60°C, respectively, which at-tributes to the bright maroon color of the coating with an increase in weight of 46%. The uncoated and coated powders were subjected to mi-crostructural studies using scanning electron microscope (SEM) and the phases were analyzed using X-ray diffraction (XRD). An attempt was made to understand the growth mechanism of the coating. The diffusion-shrinkage autocatalytic model was suggested for copper growth on the molybdenum surface. Molybdenum powders with a diameter of approximately 3 μm were coated with copper using the electroless plating technique in the pH 12.5-13 and temperature range of 55-75 ° C. The optimization of the electroless copper bath was evaluated through the combination of process parameters like The optimized values ​​of pH and temperature were found to be 12.5 and 60 ° C, respectively, which at-tributes to the bright maroon color of the coating with an increase in weight of 46%. The uncoated and coated powders were The attempt to mi-crostructural studies using scanning electron microscope (SEM) and the phases were analyzed using X-ray diffraction (XRD). An attempt was made to understand the growth mechanism of the coating. The diffusion-shrinkage autocatalytic model was suggested for copper growth on the molybdenum surface.
其他文献
(一) 組幟參觀團的目的 東北有色金属鑛山分散各地,開工先後不一,生產技術效率高低不等。在管理方面,夾皮溝金鑛的勞動組织和一切制度都较健全而週密;岫岩鉛鑛在黨、政、工
面向台式电脑的Core 2 Duo(酷睿2双核)处理器已广泛上市半年有余,出色的性能早已为人们所认同。与此同时,英特尔一方面推出4核产品抢占最高端市场,而另一方面又推出E4000系列
今天是立夏,我们班每个小朋友都带了一个蛋。第一步——画中午,我们兴致勃勃地拿出鸡蛋,开始给蛋化妆。我画了一个眉毛弯弯的小姑娘,水灵灵的大眼睛,嘴角向 Today is the be
“如果感到幸福你就拍拍手,如果感到幸福你就拍拍手……”  《幸福拍手歌》这首歌谣多熟悉呀!随着旋律响起,我们一起拍拍手、跺跺脚、伸伸腰、挤挤眼儿……  幸福是比快乐还要快乐的事,幸福是比满足还要满足的感觉。“一千个读者眼里有一千个哈姆雷特”,一千个幸福的人心中有一千种不同的感受,甚至还要丰富。  你感受到幸福了吗?你正在寻找幸福吗?  其实,幸福就在我们身边,它像泉水一样叮咚叮咚,它像和风一般轻拂
The performance of multi-layer(1-x)La_(0.8)Sr_(0.2)MnO_3/xYSZ graded composite cathodes was studied as electrode materials for intermediate solid oxide fuel cel
这家工厂生产Y系列三相异步电动机。熟悉电机行业的人们知道,它那复杂的图纸,精确的计算,细致的工艺,科学的装配,都有严格的要求,相当的难度。那操作工人,不但要具备一定的
芸苔属植物的分类学和细胞学的研究,成果很多。但两者所得到的结果,不相符合。融会两方面的成果而创立芸苔属植物新分类方法始自Pearson。Pearson于1928年提议,参照芸苔属植
2月27日 晴  打羽毛球是我最喜欢的活动了。星期天,我又和舅舅到楼下打了一场。  开始由我先发球,我把球扔向空中,拿起球拍用力一挥,球快速地飞向了舅舅,可是人算不如天算哪,球在途中遭遇了一阵大风,竟然向我飞回来了。哎,发球失败。不过还好,第二个球让我发过去了。只见舅舅举起球拍,向我这边轻轻一挥,球就稳稳地飞了过来,我急忙跑过去接球,可是我认为明明瞄准的球却没接着,有点气馁。舅舅好像知道了我的心思
期刊
基于MATLAB7.11数学计算软件中笔者改进后的分枝定界混合整数离散优化工具,研究了弧齿锥齿轮的设计参数优化问题,并以冶金设备减速器的一对弧齿锥齿轮为例进行优化设计,得到
文学是语言的艺术,它是靠语言作为基本工具来反映生活的。古今中外,一切伟大的文学家无不在语言的学习和锤炼上下功夫。厄内斯特.海明威(Ernest Hemingway)是二十世纪美国文