Co3O4对RuO2—TiO2（60）／Ti阳极析氯活性和欧姆降的影响

用稳态恒电流法和断电流技术研究了Co_3O_4对RuO_2-TiO_2(60)/Ti阳极析氯催化活性和欧姆降的影响。适量Co_3O_4可以大大提高RuO_2-TiO_2(60)/Ti阳极的析氯催化活性,明显减小涂层欧姆降。RuO_2(40)-TiO_2(60)/Ti阳极涂层中近65％的RuO_2被Co_3O_4取代后,电极析氯速率不会下降。     

Self-organized porous TiO2 and ZrO2 produced by anodization

The present work investigates the electrochemical formation of self-organized high aspect ratio TiO₂ and ZrO₂ nanotube layers. The formation and growth of a self-organized porous layer can be achieved directly by anodization without any templates in fluoride containing electrolytes. The morphology of the porous layers is affected by the electrochemical conditions such as the electrolyte composition, the pH and the exact polarization treatment (such as the potential sweep rate from the open-circuit potential to the anodizing potential). For Ti, nanotube layers are formed with diameters varying from approx. 20 nm to 100 nm and lengths from approx. 0.25 μm to 2.5 μm depending on the electrolytes and pH. On the other hand, for Zr, tubes of 50 nm in diameter and up to approx. 17 μm in length can be grown—a key parameter in this case is the potential sweep rate. The large difference between Ti and Zr in the achievable thickness of nanotube layers indicates a difference in the growth mechanism which may be based on the different chemical dissolution rates of electrochemically formed oxides.     

不同孕育剂对高碳当量高锰灰铸铁组织与性能的影响

研究了不同的孕育剂对高碳当量高锰灰铸铁组织和性能的影响。结果表明：加入一定量的Mn和CaSi的孕育剂可以明显改善孕育效果，细化珠光体组织，改善石墨形态，从而提高灰铸铁的力学性能；当总Mn含量为2．1％时，孕育剂为0．2％Mn 0．2%SiCa 0．2SiFe，材料的组织形态和力学性能最佳。     

钪系阴极基体的研究

采用氧化钪与钨机械混合、氧化钨与钪盐水溶液固液掺杂法制备了氧化钪-钨基体，采用扫描电镜及原位俄歇电子能谱方法研究了基体中钪的分布及阴极基体的抗离子轰击性能。结果表明，采用液固法制备的烧结体，氧化钪分布均匀，这样的结构有利于钪的扩散和补充，原位俄歇轰击实验结果表明，阴极基体具有良好的耐高温和耐离子轰击性。     

铝阳极氧化膜的形态 结构和成分分布的研究

用 TEM、SEM、AES 和 x 射线衍射技术研究了铝阳极氧化膜的形态、结构和化学成分分布。试验结果表明,在硫酸中形成的阳极氧化膜和在磷酸和草酸中形成的膜一样,也存在着多孔型和壁垒型两种形态,但其临界电流密度较高。铝阳极氧化膜由过剩的铝和 Al_2O_3组成,属非晶态结构,镍盐和锡盐电解着色后非晶态结构和膜中 Al、O 和 S 的分布均无显著改变,而 Sn 和 Ni 则沉积于膜孔底部,但其分布略有不同;着色添加剂的组成物未有明显地进入膜中。     

Interaction between alloying and hardening of cast iron surface

To improve wear resistance of surface will increase the service life of gray cast iron directly.This paper presents that gray cast iron surface coated with alloy powder is locally remelted by TIG arc of increase the wear resistance.The influences of arc current and scanning rate etc on surface properties are found.Under different conditions.the microstructure,hardness and wear resistance of remelted layer are analyzed and measured.The results indicate that the gray cast iron surface can be strengthened by TIG arc local remelting treathent.Especially,surface alloying hardening effect is best and surface properties are improved remarkably.     

热处理对铸铁基多孔陶瓷复合材料组织与性能的影响

研究了热处理对铸铁基多孔陶瓷复合材料组织与性能的影响，结果表明，热处理正火，淬火均可不同程度地提高该复合材料的整体强度与耐磨性，而不影响铸铁－陶瓷的界面结构及材料的透气性。     

用临界钝化电流法和液晶法检测金属氧化物膜的缺陷率

用临界钝化电流法和液晶法，研究了不锈钢上Ｔａ２Ｏ５，ＺｒＯ２的高频溅射膜的缺陷率，建立了ＣＰＣＤ法中与薄膜有关的电流密度Ｉｆ与膜厚ｄ之间的关系式：Ｉｆ＝ｋ（１－θ）＾ｄ，利用液晶的动态散射模型建立了动态无损伤检测膜缺陷率的新方法，并证明了这两种方法的检测结果有良好的直线关系。     

Microcrack generation and its healing in the oxide scale formed on Fe-Cr alloys

Fe -base alloys containing 5, 10, and 20 wt. % Cr were oxidized in a stream of O₂ at 750 and 900°C up to 264 hr. A sulfur decoration method was applied to detect the cracks generated in the scale during oxidation. This method revealed frequent crack generation and its healing in the scale. In the case of low-Cr alloys, the cracks are filled up with newly formed Fe-rich oxide but may be regenerated during further oxidation. Cracks are generated in the scale on an Fe-20Cr alloy also, although this alloy is not so severely attacked because of rapid healing.     

气体试样表面质量对氧含量的影响

低氧含量钢种是目前各钢铁企业开发的主要品种，尤其是齿轮钢、气瓶钢等对氧含量的要求较严，所以准确测定钢中的氧含量也是控制钢材性能指标的一种手段。