THE MECHANISM FOR NANOMETER-SIZED TiC SYNTHESIZING BY MECHANICAL & THERMAL ACTIVATION PROCESSING

来源 :Acta Metallurgica Sinica(English Letters) | 被引量 : 0次 | 上传用户:zhouqin1983
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
A novel process for synthesizing nano-ceramics powders, named mechanical & therm al activation processing, is discussed in the present paper. It is a processing based on thermal activation in liquid phase (molten salt) after mechanical activ ation. The nanometer-sized TiC particles (15-20nm) have been synthesized by the method, and analyzed by X-ray diffraction (XRD), transmission electron microscop e (TEM), scanning electron microscopy (SEM) and energy dispersion X-ray (EDX) sp ectroscopy. An interface interaction between liquid (molten salt) and solid (fin al product particles) phases plays a dominating role for the control of product particles size. The mechanism for the formation of nanometer-sized TiC particles has been discussed. A novel process for synthesizing nano-ceramic powders, named mechanical & therm al activation processing, is discussed in the present paper. It is a processing based on thermal activation in liquid phase (molten salt) after mechanical activation. The nanometer-sized TiC particles (15-20 nm) have been synthesized by the method, and analyzed by X-ray diffraction (XRD), transmission electron microscop e (TEM), scanning electron microscopy (SEM) and energy dispersion X-ray (EDX) sp ectroscopy. An interface interaction between liquid (molten salt) and solid (fin al product particles) phases plays a dominating role for the control of product particle size. The mechanism for the formation of nanometer-sized TiC particles has been discussed.
其他文献
Europium and terbium coordination polymers of pyridine-3-carboxylic acid were in-situ composed with ethyl methacrylate (EMA). With the polymerization of EMA mon
According to the physical and chemical design, a kind of kaolinite /dimethylsulfoxide/carboxymethyl starch (CMS) ternary nanocomposite was prepared by the two-s
“知人论世”是传统的读书方法,历来受到语文阅读教学的重视。在教学实践中,作品背景介绍的方法方式经历了许多的变化,教师口述、文字介绍、教学案预习、多媒体视频展示、学生课外收集等等,但基本不外乎“作者生平——写作背景——意义分析”流水线式的操作,将作者情况及作品背景视为理解作品的重要途径,甚至将这一过程作为完整的教学不可或缺的一个环节,无视其与作品理解的关系。  阅读的本质是读者与文本、读者与作者之间
在语文教学中,适时适“度”地进行德育渗透,是语文教学的重要任务,是语文课堂教学的有机组成部分,也是目前实施素质教育,培养全面发展的学生的迫切需要。那么,怎样才能做到“适度”而“不及度”或“过度”呢?我认为,首先应从语言文字入手,做到如下几点:  一.据文悟道,准确把握语文教学中德育渗透的精度  大凡文章,不论诗歌、散文,还是戏剧、小说,都是语言文字与思想内容的有机统一,即“文”与“道”的结合,其中
答案  吉吉是按数字上下颠倒会怎样来分组的。1、3、8、0颠倒后还与原来基本相同;6、9颠倒过来,6变成9,9变成6;2、5颠倒过来,倒2很像5,倒5很像2;只有倒4什么也不像。  苏苏的分法:1、3、7、8注音为阴平,即第一声;2、4、6注音都是去声,即第四声;5、9注音为上声,即第三声;0注音为阳平,即第二声。楚楚的分法:4、5是两画,其余数字都是一画。
A transparent tellurite glass-ceramic containing nanocrystals based on the composition of 15Li_2O-15Nb_2O_5-70TeO_2-0.1ErEr_2O_3-0.4Yb_2O_3(mol%)was prepared by
期刊
“风烟俱净,天山共色,从流飘荡,任意东西。”——《与朱元思书》“衔远山,吞长江,浩浩汤汤,横无际涯,朝晖夕阴,气象万千。”——《岳阳楼记》“冰皮始解,波色乍明,鳞浪层层,
The curve of crystallization transition during continuous heating for the ~Zr_~41 Ti_~14 Cu_~12.5 Ni_~10 Be_~22.5 bulk ~amorphous alloy was measured by means of
《数学大王》(智力快车)改版一年啦!这一年中,你有什么收获啊?别光说,不亮真家伙。翻看2015年11期的时候,你有没有发现老叔送的大礼呢?是的,老叔故意设了两处陷阱:1.老叔故意
期刊
“末位淘汰”是近年较为通行的一种人事管理办法,也是人们关注的热点问题之一。对其功过是非,利弊得失,可谓是仁者见仁、智者见智,已有不少观感见诸报刊。对此,笔者也谈点一