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The amalgam containing ball milled powder had the lower diametral tensile strength .

机械性质方面,添加球磨粉末的汞齐合金径向抗拉强度较低,潜变量也明显比不添加球磨粉末的高。

In order to justify the efficiency during the water elutriation process of separating ceramic inclusions from FGH95 alloy powder, the maximum theoretical and experimental size of FGH95 powder elutriated was compared at different water flowing velocity.

摘 要:通过对水淘析法的原理分析,运用流体力学中的摩擦数群法确定了以陶瓷夹杂物在水中的沉降速度来确定水流速度,及在确定的水流速度下,所能淘析出的FGH95合金粉末的最大尺寸;并以比较淘析出的FGH95合金粉末的实际最大尺寸与理论最大尺寸,考察了水淘析法分离FGH95合金粉末中的陶瓷夹杂的有效性。

SEM showed that the morphology of these powders was like sheaf, and similar to spherulite.

PA-I粉末的SEM研究表明粉末的形态结构呈捆束状,类似于球晶。

In order to reduce the cost more and accelerate the application in the civil area, the laser rapid forming technology with low cost hydrogenation dehydrogenization titanium alloy powders had been investigated, and the following results were obtained:1 Disclosed the formation mechanisms and influencing factors of t.

为进一步降低该技术的成本,促进其在民用领域的发展,本文针对低成本氢化脱氢(hydrogenmiondehydrogenization,HDH)钛合金粉末的激光快速成形进行研究,取得的主要成果如下: 1。从粉末特性及成形工艺角度揭示了缺陷的形成机理及影响因素,结果发现:(1)气孔的产生是由于粉末在成形过程中卷入成形气氛中的氩气所致。

It was found that the Mo-Cu compound powder after high energy ball milling was in a inequilibrium energy storage state.

本文通过对Mo-Cu复合粉末的机械合金化研究表明,经过高能球磨后的Mo-Cu复合粉末,处于非平衡储能状态。

The result showed that the powder microelectrode with WC prepared in the CH4/H2 atmosphere showed better catalytic activity forα-nitronaphthalene electrochemical reduction. This result was mainly attributed to different post treatments and surface morphological structures of two types of WC powders. Moreover, the WC-PME with WC prepared in the CH4/H2 atmosphere showed good chemical stability.

结果表明,以CH4/H2为还原碳化气氛所制备的WC粉末,其制成的粉末微电极对NP具有更良好的电催化活性,这主要与该WC粉末的结构形貌及其制备后的处理工艺有关,同时该WC-PME具有良好的化学稳定性。

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。

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 results show that the coating surface of electrodeposited pretreatment powder is uniform, and the wear resistance is improved.

结果表明,电镀Cu预处理粉末的喷涂层表面较为均匀,耐磨性约为粘结破碎法预处理粉末喷涂层的2倍。

The isothermal kinetics of nanogram obtained by MA has been studied in section three. The grain growth of α solid solution of Fe〓CuNb〓Si〓B〓 powders is controlled by a single kinetics within the experimental temperature range, the activation energy for grain growth is 80.3kJ/mol, magnetic properties of powders at different annealing and milling conditions are measured, a preliminary effort has been given to the consolidation of Fe〓CuNb〓Si〓B〓 powders.

第三部分研究了机械纳米晶化粉末的等温晶粒长大动力学,在实验研究的温度范围内,Fe〓CuNb〓Si〓B〓纳米晶α固溶体的晶粒长大由单一的动力学过程所控制,其晶粒长大激活能为80.3kJ/mol,研究了不同球磨条件及热处理条件下纳米晶粉末的磁性,对纳米晶粉末的成型进行了初步的尝试。

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