The bulk graphite was prepared from raw materials of calcined coke and coal-tar pitch by the hot-pressing process in order that the effects of the binder and calcined coke grain content on the conductivity of the bulk graphite can been investigated.
结果表明:石墨材料的传导性能不仅依赖于原料种类、粒度,而且与其质量配比有关,且最佳原料配比所制备的块状石墨具有高密度、低孔率、低电阻以及高导热等特点;填料煅烧石油焦颗粒以及粘结剂用量的过多或过少,都不利于石墨材料的传导性能,本文填料中最佳煅烧石油焦颗粒用量为25％,原料中最佳粘结剂含量为25％。
According to stress of graphite austenite eutectic cell during solidification, the caues of chunky graphite of hot spot and some factors are analysed in this article.
本文从球墨铸铁石墨———奥氏体共晶团形成及长大过程中的应力出发 ,分析了大断面球铁热节处非球形石墨—碎块状石墨的形成原因及若干影响因素 ,提出了防止措施。
The nesnlts show that St will fiercely promote the formation of chunky graphite when more than 2.
１％时，强烈促进碎块状石墨的形成，防止碎块状石墨的关键是减少Ｓｉ，使球铁碳当量不超过共晶碳当量。
Improve development response of fractured, bottom water, massive, metamorphic rock, and buried hill reservoir;
裂缝型底水块状变质岩古潜山油藏改善开发效果研究
The hardness of compacting and blocky magnetite is high and the magnetite has big plasticity,so the magnetite is a kind of tough shooting ore.
致密块状磁铁矿坚硬,同时又具有较大的塑性,属于难爆矿石。
It is identified that a new bulk amorphous alloy with the largest supercooled liquid region TX of 100 K was obtaine.
用铜模铸造方法制备了不同尺寸的Zr55Al10Cu30Ni5-xPdx(x=0,1,3,5)块状非晶合金,采用X射线衍射(XRD)、扫描差热分析(DSC)和透射电镜(TEM)分别对Zr55A110Cu30Ni5-xPdx块状非晶样品的结构、热稳定性和微观组织进行了研究。
The paper was based on preparing the bulk amorphous alloy and testing it's friction and wear property in Cu-Zr-Al system, the process of preparing the bulk amorphous alloy by magnetic levitation melting - copper modle suction method was studied ,what was more, prepared the metallic ,glass matrix composites by unidirectional solidification.
本文以Cu—Zr—Al系块状非晶的制备及其摩擦磨损性能研究为背景，对磁悬浮—铜模吸铸法制备块体非晶作了研究，并用定向凝固法制备了非晶基自生复合材料。
Re and Os concentrations and Os isotopic ratios for disseminated and massive ores from the Jinchuan Cu-Ni sulfide deposit are analyzed.
分析了金川铜镍硫化物矿床的一组浸染状矿石和一组块状矿石的Re、Os含量和Os同位素组成。