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Study on Mg-PSZ Ceramics Doped with Y2O3 and CeO2 TAN Jia-qi1,YUAN Qi-ming1,MA Ya-lu2 (1.Department of Materials Science and Technology, Tianjin University, Tianjin 300072, China;2.Department of Chemistry, Tianjin University, Tianjin 300072, China) Abstract:Mg-PSZ ceramics doped with Y2O3 and CeO2 was prepared using traditional processing method. The fine-grain PSZ ceramics(dc≤10 μm) sintered......
energy of fracture. Key words: CaO-Al2O3-SiO2; glass-ceramics; Y2O3 doped; crystallization 1 Introduction Calcium aluminum silicate (CAS) glass-ceramics have excellent wear-resistant and chemical.... In this paper, we prepared CAS glass-ceramics doped with Y2O3 and investigated the effects of Y2O3 addition on the crystallization and mechanical properties of glass-ceramics. 2 Experimental......
Synthesis of Y2O3 Nano-Powder from Yttrium Oxalate under Ambient Temperature Li Ling1 (1.Department of Physics, Jinan University, Guangzhou 510632, China) Abstract:High purity Y2O3 nano-powders was synthesized directly from solution of industrial YCl3 by method of oxalate precipitation through super-micro-reactors made by complex non-ionic surfactant. The purity and diameter of Y2O3 particles......
Site Selective Spectroscopy of Surfactant-Assembled Y2O3∶Eu Nanotubes 吴长锋1,张继森1,赵丹1,秦冠仕1,秦伟平1 (1.Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun,130022, China) Abstract:Y2O3:Eu nanotubes were synthesized by a surfactant assembly mechanism. Under ultraviolet-light excitation, the nanotubes present......
等离子体电解阴极沉积Y2O3陶瓷涂层 王德仁1,薛润东1,何业东1,韩伟1 (1.北京科技大学,北京市腐蚀,磨蚀与表面技术重点实验室,北京,100083;2.吉林化工学院,吉林,132022) 摘要:在Y(NO3)3水溶液中,以Fe25Cr5Al合金为阴极,研究了等离子体电解阴极沉积Y2O3陶瓷涂层的规律.研究发现,当施加的槽电压超过临界值时,阴极发生气膜微弧放电,在合金表面沉积出Y2O3陶瓷涂层.研究了施加槽电压,沉积时间,Y(NO3)3浓度对沉积Y2O3陶瓷涂层的影响.扫描电镜(SEM),X射线衍射(XRD)分析结果表明,获得的Y2O3陶瓷涂层表面具有熔融的特征,涂层致密与基体结合牢固.探讨了等离子体电解阴极沉积Y2O3涂层的机理. 关键词:等离子体电解阴极沉积; 气膜微弧放电; Y2O3陶瓷涂层; [全文内容正在添加中] ......
Effect of dopant content on microstructure and properties of Si-Al-K doped molybdenum LI Da-cheng(李大成)1, ZHOU Zhang-jian(周张健)2, PU Chun-yang(卜春阳)1 1. Technology Center, Jinduicheng Molybdenum... properties and microstructure of molybdenum powder, sintering product and fabricated wires were studied. The molybdenum powder was produced firstly by reduction of molybdenum oxide which is doped......
Y2O3对93WNiFe合金自锐性的影响 才鸿年1,吴复尧1,程兴旺1 (1.北京理工大学,材料科学与工程学院,北京,100081) 摘要:为了提高传统93WNiFe合金在侵彻装甲时的自锐化能力,采用粉末冶金的方法,在传统93WNiFe合金中加入了少量的Y2O3,经过1200 ℃氢气氛中预烧和1480 ℃烧结以及1100 ℃的真空退火热处理后烧结成为93W-Y2O3合金,其密度达到了理论密度的98.74%.静态力学性能测试结果表明:室温下抗拉强度为891 MPa,延伸率为20%,保证了其作为穿甲弹战斗部用钨合金材料的基本力学性能;动态力学性能测试结果表明:在应变为0.28,应变率为3500 s-1时,93W-Y2O3合金内部出现了明显的裂纹及大量的微裂纹,而裂纹源正是起始于粘结相中的Y2O3陶瓷相.因此,在93W合金粘结相中形成的弥散Y2O3陶瓷相,可以作为钨合金中微裂纹的萌生源来......
Y2O3原始粉末在PMP样品制备中的作用 栾文洲1,冯勇2,周廉2 (1.北京有色金属研究总院超导中心,北京,100088;2.西北有色金属研究院超导所,陕西,西安,710016) 摘要:在PMP工艺原始粉末中, 用Y2O3粉代替211粉生成123相, 研究了新工艺样品的微观结构和超导性能. 结果表明, 此工艺的预烧温度不应高于700 ℃, 以免在包晶反应之前形成123相, 这一温度远低于传统工艺的预烧温度. Y2O3样品与PMP样品有相似的微观结构, 但Y2O3样品的残余211粒子的尺寸更加细小, 可能诱发大量层错,位错等晶体缺陷作为钉扎中心, 有利于提高样品的超导性能. Y2O3样品在高场下的JC值比传统的PMP样品高, 其各向异性也有所改善. 用Y2O3代替211的PMP新工艺具有提高其超导性能的巨大潜力. 关键词:高温超导体; PMP; YBCO; Y2O3粉末......
Mechanical behaviors of alumina ceramics doped with rare-earth oxidesYAO Yijuna,LI Chunchenga,b,WANG Linga,JIANG Xiaolonga,and QIU Taib a School of Mathematics and Physics,Nanjing University... and Y2O3 additions were 455 and 439 MPa,respectively,higher than that with La2O3 addition.The fracture toughness of the ceramics with Sm2O3 and Y2O3 were also higher than that with La2O3 addition.The......
Ultrasonic Degradation of Methyl Orange in Presence of Y2O3 Doping Anatase TiO2 Catalyst Guo Baodong1,PAN Zhijun1,Wen Fuyu1,LIU Zhenrong1,ZHANG Zhaohong1,Wang Jun1 (1.Department of Chemistry, Liaoning University, Shenyang, 110036 China) Abstract:Various affecting factors and degradation mechanism were studied on ultrasonic degradation of methyl orange adopting Y2O3 doping anatase TiO2 catalyst......
