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microscopy(SEM) analyses show the presence of ZrB2 and Al2O3 as the primary phases in the composite powders, while the presence of a very small amount of ZrO2 is thought to be unreacted zirconium oxide... powders are analyzed and the microstructures are also characterized. 2 EXPERIMENTAL Amorphous boron oxide powder(mean particle size below 44μm, purity 99.8%), zirconium oxide powder(mean particle......
. The decomposition product is sodium zirconium silicate (Na2ZrSiO5), and the decomposition rate is higher than 99% under the optimal conditions. Key words: zircon sand; decomposition; kinetics; sub-molten salt; sodium zirconium silicate 1 Introduction Zirconium is a metal with high hardness, high ductility, and wide applicability. Zirconium compounds are widely used in ceramics, chemicals, electronics, military......
高比表面积有序多孔氧化锆的合成与表征 严东生1,陈航榕1,张文华1,施剑林1 (1.中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室,上海 200050) 摘要:有序多孔氧化锆是近年来国际上的研究热点之一,本文利用表面活性剂辅助模板机理成功地合成出稳定性高(>550℃),比表面积大(>350m2/g),且有序度高的多孔氧化锆,并用FT-IR, XRD,HRTEM,以及N2吸附 -脱附等方法进行了表征. 关键词:有序; 多孔氧化锆; 合成; 表征; order; porous zirconium oxide; synthesis; characteristics; [全文内容正在添加中] ......
Effect of yttrium,calcium and zirconium on ignition-proof principle and mechanical properties of magnesium alloys樊建锋1,2,3,陈志远1,2,3,杨伟东1,2,3,方爽1,2,3,许并社1,2,31. Key laboratory of Interface Science... and elongation of 11%.Auger electron spectros-copy(AES) and X-ray diffraction(XRD) analysis revealed that the oxide film formed on the surface of Mg-3.5Y-0.8Ca alloy was mainly composed......
Effect of yttrium,calcium and zirconium on ignition-proof principle and mechanical properties of magnesium alloys樊建锋1,2,3,陈志远1,2,3,杨伟东1,2,3,方爽1,2,3,许并社1,2,31. Key laboratory of Interface Science... and elongation of 11%.Auger electron spectros-copy(AES) and X-ray diffraction(XRD) analysis revealed that the oxide film formed on the surface of Mg-3.5Y-0.8Ca alloy was mainly composed......
℃ is up to 135.44m2/g, and the surface area of aged sample calcined at 900℃ for 6h is 44.07m2/g. The more thermal stable cerium zirconium mixed oxide powders were obtained by the process of co-deposition... L K, Stephanopoulos M F. Reduction characteristics of copper oxides in cerium and zirconium oxide systems[J]. Applied Catalysis A: General, 1998, 171: 13-29. [13]Nascente P A P, Dulcina P F, de......
锆处理对低合金钢大线能量焊接粗晶区组织与性能的影响夏文勇1,2,杨才福1,苏航2,柴锋2,雍岐龙2(1.北京市钢铁研究总院结构材料研究所2.江西省新余市新余钢铁有限公司)摘 要:采用焊接热模拟和热力学计算相结合的方法,研究了锆处理对低合金高强船体钢大线能量焊接粗晶区组织与性能的影响.结果表明:锆处理钢对钢中形成的氧化物类型,粒度及分布存在显著影响.当钢中锆的质量分数低于85×10-6时,钢中形成复合的Zr-Ti-O氧化物颗粒.其......
. In-reactor corrosion performance of ZIRLO and Zircaloy-4[C]//Zirconium in the Nuclear Industry: Tenth International Symposium. Philadelphia, USA: ASTM STP 1245, 1994: 724-744. [5] Nikulina A V, Markelov V A, Peregud M M, Bibilashvili Y K, Kotrekhov V A, Lositsky A F, Kuzmenko N V,Shevnin Y P, Shamardin V K, KobylyanskyG P, Novoselov A E. Zirconium alloy E635 as a material for fuel rod cladding and other......
添加Cu对M5合金在500℃过热蒸汽中耐腐蚀性能的影响李士炉1,姚美意1,张欣1,耿建桥1,彭剑超2,周邦新1(1.上海市上海大学材料研究所2.上海大学 微结构重点实验室)摘 要:用高压釜腐蚀实验研究了添加0.05%-0.5%Cu(质量分数)对M5(Zr-1%Nb)合金在500℃/10.3 MPa过热蒸汽中耐腐蚀性能的影响;用TEM和SEM分别观察了合金基体和腐蚀后氧化膜的显微组织.结果表明:Cu含量低于0.2%时,随着Cu含量的增加,合金的耐腐蚀性能得到明显改善;继续提高Cu含量则对进一步改善合金耐腐蚀性能的......