| 1. | Technical specification for silver - metaloxide electrical contacts by alloy internal oxidation method 合金内氧化法银金属氧化物电触头技术条件 |
| 2. | At present , the majority of the fabrication methods of this composite are internal oxidation and power metallurgy which have some drawbacks such as complicated fabrication , high cost and so on 目前,其制备方法主要为内氧化法和粉末冶金工艺路线,这些都存在着工艺复杂、成本昂贵等问题。 |
| 3. | Fortunately , we have succeeded to prepare cu - mgo interface specimen by internal oxidation . a plenty of different orientations with different interfaces between cu and mgo have been observed and selected by tem 我们用内氧化方法成功地制备了cu - mgo界面,运用透射电子显微镜对大量不同取向的界面进行了研究。 |
| 4. | During the course of new type vacuum internal oxidation reaction , homogeneous dispersed a - aljos particles were formed in copper matrix . the average size of a12o3 particles and their distance are 120nm and 400nm respectively 在新型真空内氧化过程中,铜基体内生成了均匀弥散分布的g - al2o3粒子,其平均尺寸和颗粒间距分别为120nm和400nm 。 |
| 5. | Abstract : by means of mineralogical study of earlier slag samples of the flash furnaceanalyze the mineralogical composition and its variation , so that expose oxidation atmosphere in furnace and required controlled parts in the later smelting 文摘:本文通过对闪速炉前期炉渣的矿物学研究,分析矿物的组成及变化情况,以揭示炉内氧化气氛的强度及在后期冶炼中需注意控制的部分。 |
| 6. | In this paper , metastable cu - al alloy powder with different aluminum content was prepared by mechanical alloying technique . high strength and high conductivity cu - al2c > 3 composites were prepared by a new type vacuum internal oxidation technique 本文采用机械合金化法制备了不同铝含量的亚稳态的cu - al合金粉末,采用新型真空内氧化工艺制备了不同成分的高强度高导电cu - al2o3复合材料。 |
| 7. | Two types of internal oxidation techniques were adopted , namely internal oxidation under nitrogen protect and new type vacuum internal oxidation in the present study . both techniques can achieve the oxygen partial pressure that the internal oxidation reaction of cu - al alloy can take place 本文采用的两种内氧化工艺,即氮气保护下的内氧化和新型真空内氧化工艺,都可以满足cu - al合金发生内氧化的气氛条件。 |
| 8. | The analyses of the microstructures as well as the characterizations of microcracks , deposition defects and residual pores of 3d c / sic composites have been done to determine the main diffusion channels of oxygen into the composites at different temperature domains . 2 对3dc sic复合材料的显微结构进行了表征,对材料中的各种微裂纹、缺陷和孔隙进行了分析,研究了不同温度区间内氧化性气体在复合材料中的主要气相扩散通道。 |
| 9. | Mechanism of arsenic - induced oxidative stress in human cells . we have demonstrated that arsenic treatment enhances the levels of intracellular oxidants and also modulates cellular antioxidant activities . heme oxygenase is constitutively expressed in cl3r15 cells , arsenic - resistant human adenocarcinoma cells 二、砷化物诱引氧化性伤害之机制:先前的研究显示砷化物处理会造成细胞内氧化性物质的增加,也会影响细胞内的抗氧化活性。 |
| 10. | The condition which the internal oxidation reaction of cu - al alloy can take place has been studied ; technique parameters have been set on the basis of theoretical analyze ; different factors which can affect the microstructure and properties of cu - al2o3 composites have also been discussed . the ambient temperature properties and the thermal stability of composites were tested . several electrical conductivity models were optimally selected to calculate the electrical conductivity of cu - ahoa composites . the results showed that : 1 研究了cu - al系合金粉末发生内氧化所需的条件,根据理论分析制定出相应的工艺参数;分析研究了各种影响cu - al2o3复合材料组织与性能的因素;测试了本课题制备的cu - al2o3复合材料的室温性能,热稳定性能;优选了适合cu - al2o3复合材料的电导模型。 |