查询词典 graphite

X-ray radiography, X-ray radioscopy and X-ray computed tomography were performed to the C preforms and C/SiC composites made by chemical vapor infiltration method. Elementary research of the simulation of X-ray nondestructive testing of C preforms and C/SiC composites was conducted. The main contents and conclusions are summarized as follows:(1) The equivalent absorption coefficients of graphite and SiC to Al (KAl/sic, KAI/C) were measured. It was found that in 35-45KV, KAl/sic=1.1~1.2 and KAl/c=0.08~0.12. That means X-ray radiography was much less sensitive to fiber defects than to SiC matrix. It was suggested that Al Image Quality Indicator would be used to evaluate the quality of X-ray radiographs of C/SiC.

本文选择X射线照相、X射线实时成像和X射线CT等三种方法对C纤维预制体及C／SiC复合材料进行了检测和研究，并对C／SiC复合材料X射线检测的计算机模拟做了初步的探索，主要研究内容和结果如下：(1)测定了C和SiC的X射线照相等效系数，在35～45KV的条件下，Al对SiC的等效系数K_为1.1～1.2，Al对C的等效系数K_为0.08～0.12，所以X照相射线检测C／SiC对C纤维缺陷不敏感，而对SiC基体缺陷敏感。

The re-search on the composite of metals and graphite is more attracted.

本文主要讨论了表面活性剂在石墨镀铜过程中的作用。

"Modern furnaces range in heat size from a few tons up to 400 tons (360 metric tons), and the arc s strike directly into the metal bath from vertically positioned, graphite electrodes to remelt scrap steel or refine briquettes of direct-reduced iron ore."

现代电炉的装料量从数吨到400吨(360公吨)不等，而且电弧从垂直放置的石墨电极直接射入金属熔池。

"Modern furnaces range in heat size from a few tons up to 400 tons (360 metric tons), and the arcs strike directly into the metal bath from vertically positioned, graphite electrode s to remelt scrap steel or refine briquettes of direct-reduced iron ore."

现代电炉的装料量从数吨到400吨(360公吨)不等，而且电弧从垂直放置的石墨电极直接射入金属熔池。

"Modern furnaces range in heat size from a few tons up to 400 tons (360 metric tons), and the arcs strike directly into the metal bath from vertically positioned, graphite electrodes to remelt scrap steel or refine briquettes of direct-reduced iron ore."

现代电炉的装料量从数吨到400吨(360公吨)不等，而且电弧从垂直放置的石墨电极直接射入金属熔池。

Because of large difference in coefficients of thermal expansion between graphite fiber and magnesium matrix, there was high residual stress in matrix near the interface.

由于石墨纤维和碳化硅颗粒与镁基体的热膨胀系数相差很大，在界面区域基体中存在较高的残余应力。

Expanded graphite in the field of application of fire retardant, flame-retardant industry will undoubtedly bring a new dynamic.

膨胀石墨在阻燃领域的应用，无疑会给阻燃界带来新的动力。

The results indicate that an even layer of nickel was plated on expanded graphite. Ni accounted for 94.12% and P accounted for 5.88%. The reflectivity was increased in the near infrared region. The magnetism capability was enhanced. The magnetization and the retentivity were 26.3 Am^2/kg and 8.1 Am^2/kg respectively. The σ/σ was 0.31. The obtained material belongs to soft magnetism material.

结果表面，膨胀石墨表面被镍层均匀包覆，其质量分数镍占94.12%、磷占5.88%，镀覆后产品在近红外波段反射率明显增大，磁性能明显增强，饱和磁化强度σ=26.3 A平方公尺/kg、剩磁σ=8.1 A平方公尺/kg、σ/σ=0.31，分析结果表明其属于软磁性材料。

According to the principle of mechanics by optical Brinell sclerometer made in china and special fixture self-made,the elastic module of carbon-graphite was determined.

文摘：依据力学原理利用国产光学布洛维硬度计和自制专用夹具对炭石墨材料弹性模量进行了测试，同时与国外同类材料的弹性模量做了对比。

5 And 1. 2-1. 3 respectively. The results showed that the graphite like carbon film had higher work function and lower secondary electron emission coefficient than those of DLC film.

总的来说，两者均具有较大的逸出功及较小的二次电子发射系数，后者的逸出功大于前者、二次电子发射系数小于前者。

If you are committed to an education career, then the Master of Arts in Education from Ashford University is for you.

如果你是致力于教育事业，那么，艺术教育硕士学位阿什福德大学是给你的。

objective:to explore the expression of survivin protein and its mrna in rectal cancer and their clinic significance.

目的：研究凋亡抑制因子survivin蛋白及其mrna在直肠癌组织中的表达及其与临床病理关系。