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Trans. Nonferrous Met. Soc. China 26(2016) 431-436 Segregation of niobium in laser cladding Inconel 718 superalloy Yi-tong LONG, Pu-lin NIE, Zhu-guo LI, Jian HUANG, Xiang LI, Xin-mei XU Shanghai Key... is widely used in the aerospace and turbine industry. Segregation of niobium appears in the laser cladding Inconel 718 superalloy and consequently influences the phase transformation during the rapid......
-xHf alloys; niobium; silicide; microstructure; strength; fracture toughness 1 Introduction Nb-silicide based in-situ composites show excellent performance in strength, creep resistance and long... of this work is to study the microstructure and high-temperature mechanical properties of niobium silicide in-situ composites, Nb-15W-18Si-xHf (x=0, 5, 10 and 15 %). It is shown that Hf addition......
simulations of melting behavior of (001) plane of niobium and tungsten YANG Xi-yuan1, HU Wang-yu2, YUAN Xiao-jian2 (1. Department of Physics and Electronics, Hunan University of Arts and Science...) simulation was performed to study the premelting and melting behavior of (001) plane of niobium and tungsten. The physical properties including the atomic positions, the layer atomic density and the layer......
and molten iron at 1600℃ was investigated for the direct alloying of steel with Nb2O6-bearing slag. The activity of niobium oxide in the slag was measured. The αNb2O5 is in the range of 10-2-10-4. TheδNb2O5 is ranged in 10°-10-2.Niobium partition decreases with the increase of[Si]% and CaO/SiO2. When α[0] and FeO decrease, niobium partition decreases too. TheδNb2o5 and the ratio of siO2 toγNb2O5 decrease......
joints:with no interlayer,with a copper interlayer and with a niobium interlayer are measured via X-ray diffraction by transmission geometry.The residual stress in all the joints is found to be generally compressive and increasing from the surface to the interface.Copper and niobium interlayers are both effective in alleviating the residual stress in the joint and the stress value in the joint......
spectrum were used to study the glass structure and the valence states of niobium ions in P2O5-Nb2O5-Li2O noncrystalling system. The colour-changing mechanism was studied. For 10Nb2O5xP2O5(90-x)Li2O (x=40,45,50,55) system glasses, it was known that the glass colout changing from light gold-yellow to blue with increasing is aroused by the Nb3+ ion increasing, not by the change of niobium ion......
%和9.23%,可直接作为钽铌湿法冶炼工业原料.关键词:钨渣;钽;铌;富集;酸法Enrichment of tantalum and niobium from tungsten residue by hydrochloric acid methodYANG Xiu-li1, WANG Xiao-hui2, XIANG Shi-biao3, SUN Qing3, WEI Chang1, ZHENG...-manganese oxides, silicate and quartz. Tantalum and niobium are mainly encapsulated in silicon-manganese phases. Based on this analysis, a new method was proposed for tantalum and niobium enrichment......
Flake tantalum powder for manufacturing electrolytic capacitorsHE Jilina,b,YANG Guoqib,PAN Luntaoa,b,LIU Hongdonga,b,and BAO Xifangb a National Special Metal Materials Engineering Research Center of Tantalum and Niobium,Ningxia 753000,China b Ningxia Orient Tantalum Industry Co.Ltd.(OTIC),Ningxia 753000,China摘 要:The FTP200 flake tantalum powder......
体晶核并不断吞噬高位错密度区,最终完全演变为平衡组织多边形铁素体. 关键词:碳铌浓度积; 冷变形; 微合金钢; 贝氏体; 热稳定性; concentration product of carbon and niobium; cold deformation; microalloyed steel; bainite; thermal stability; [全文内容正在添加中] ......