粉末

Results show that at 500℃ polycarbsilanedecomposed into noncrystallized SiC and free caron and impurities which hinder the densificationof the composite are also found during the above decomposition process, with the increase ofheating temperature, the noncrystallized SiC can be transformed into β-SiC.

一般传统的制备方法是，向C和SIC粉末中添加烧结助剂B，B；，A12O；；AIN等球磨混合，采用粉末冶金热压烧结；尽管采取了一些特殊的工艺手段和添加烧结助剂的方法，但该材料须在高于2000t时烧结且致密化效果较差［'1。

The first year of this project studied the sintering behavior of sub-micron .theta.-alumina powders. After forming using cold isostatic pressing, green specimens were heat treated at various temperature and time. The pore size distribution, density, phase transformation, and microstructure were analyzed using mercury porosimeter, XRD, SEM.

中文摘要本计画第一年进行次微米之θ相氧化铝粉末的烧结行为研究，粉末以冷均压成型后以不同之温度及时间进行热处理，坯体/烧结体以水银孔隙仪、XRD及SEM等仪器，分析其孔隙分布、密度、相转换量、微结构等。

The powderization mechanism was supposed from the morphology structure of the...

借助透射电镜观察了粉末粒子的形态，提出了粉末化机理。

After Pressureless Sintering the densification behaviour of the SiC-based powder mixtures was observed to be markedly dependent not only on the type and amount of sintering aids used, but also on the crystal structure of the SiC powder.

经过常压烧结致密化行为的碳化硅基粉末混合物被观察到明显不仅仅取决于类型和数量烧结助剂使用，而且也影响到晶体结构的碳化硅粉末。

In this paper,the merits of explosive sintering and its development are introduced first,then the method of explosive sintering and the mechanism of sintering are displayed,the relation of initialized specific volume to Hugoniot line of W-Ti is analyzed according to the discuss of Hugoniot line of pulverous materials.

本文首先对爆炸烧结的优点和国内外发展概况做了说明，接着对爆炸烧结方法和烧结机制作了简介，然后通过对粉末材料冲击绝热线的讨论，分析了W-Ti粉末冲击绝热线与其初始比容间的关系。

In this paper,the merits of explosive sintering and its development are introduced first,then the method of explosive sintering and the mechanism of sintering are displayed,the relation of initialized specific volume to Hugoniot line of W-Ti is analyzed according to the discuss of Hugoniot line of pulverous materials.

本文首先对爆炸烧结的优点和国内外发展概况做了说明，接著对爆炸烧结方法和烧结机制作了简介，然后通过对粉末材料冲击绝热线的讨论，分析了W-Ti粉末冲击绝热线与其初始比容间的关系。

Metallurgy conference and exhibition woke up the powder of PM2006 solid border that holds in Korea boiler hill again industry public figure for quite a long time " Olympic Games " dream, what also caused Chinese pulverous metallurgy how to blend in international to compete better at the same time is thoughtful.

在韩国釜山召开的PM2006固际粉末冶金会议和展览会再次唤醒了业界人士长久以来的&奥运&梦，同时也引发了中国粉末冶金如何更好地融入国际竞争的深思。

For BM 10h mixture, the structure has been characterized by nearly full laminarization in compact. The effect of mechanical activation is attributed to fining of powder grains, homogenizing of the blends, creating fresh surfaces, forming layer structure and intensifying dissolution and reprecipitation of Mo in liquiid Cu.

采用X射线衍射，微观电子显微术、EDXA和DTA热分析技术等实验手段，对混合元素粉末球磨过程颗粒变化、球磨粉末的烧结性能、活化机理、烧结合金组织与产品化工艺等方面进行了较为全面系统的研究。

The coupling agents has no obvious effect on the hardness when nano powders were used as strengthened particles.When liquid silica was used to fabricate the composites,nano particles were wraped by PTFE,reunition was prevented.Whil...

其作用机理为当用固体纳米粉末填料时，由于纳米粉末的团聚作用，丧失了部分纳米颗粒的表面特性，界面结合较差，硬度较低；而使用液体纳米硅溶胶制备PTFE复合材料时，纳米颗粒在搅拌蒸发的过程中被PTFE大分子包裹，可以有效防止团聚的发生。

The sheeted iron-based catalyst was made by powder metallurgy using pure form metallic powders as stuff.

以单质金属粉为原料，采用粉末冶金方法制备了片状铁基触媒，并借鉴目前金刚石工业中最为常用的粉末触媒组装方式及合成工艺在高温高压下进行了金刚石合成试验。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。