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by pack cementation. The static at 1600℃ and thermal cycling oxidation resistance properties from room temperature to 1600℃ were tested. The formation mechanism, surface and cross-section morphologies... to avoid cracking in the coating.
Key words: niobium alloy; MoSi2; silicide coating; pack cementation; high-temperature oxidation resistance
层；过渡层；互扩散区；反应动力学
中图分类号:TG 146.4 文献标识码:A
Preparation and structural formation of oxidation-resistant silicide coatings on Nb-based alloy by pack cementation... coatings on an Nb-based alloy were prepared by pack cementation technique. The holding temperatures were 1 050, 1 150 and 1 250 ℃ and the holding time were 2, 5, 10, 15 and 20 h, respectively......铌基合金包埋渗法制备抗氧化硅化物涂层及其组织形成
来源： 《中国有色金属学报2007年第4期》——郭喜平 赵陆翔 姜嫄嫄
in 60-90 ℃. Key words: cadmium; micro-current; zinc plate cementation; electrochemistry 镉主要用于制造合金,电镀,电池和颜料等,同时还是原子反应堆控制棒的重要成分[1-2].镉的毒性 较大[3],其提取和使用过程都需引起特别注意,国内外都曾发生严重的镉中毒事件.由于镉多伴生在铅锌矿中,因此主要作为铅锌冶炼的......
and mineral composition analysis were made. The results show that significant interval diversity of quartz cementation is the leading factor for the heterogeneity. In the lower sandstone, quartz cementation...) condition. Key words: Qunkuqiake structure zone; Donghetang Formation; reservoir quality; quartz cementation; illite-coating; primary pore 一直以来,对储层性能的预测及其非均质性主控因素的探求都是一个困扰储层地质研究者的难题.储层储集性能的优劣以及非均质性的......
Trans. Nonferrous Met. Soc. China 29(2019) 1967-1974 Process and anodic reaction mechanism of cadmium electrically enhanced cementation on zinc plate under an ultrasonic field in ammoniacal system... applied to investigating the reaction mechanism of electrically enhanced cementation of cadmium on a zinc plate. The optimum parameters were a temperature of 35 °C, a cathode-to-anode area ratio of 1:2......
that arsenic in oxidation state +6 can be readily removed for discharge (＜50×10-12 As), although additional ion exchange is needed for potable water (＜10×10-12 As). Key words: cementation; waste processing.... The distribution of arsenic at low concentrations required by potable water and groundwater regulations was determined by ICP-MS and ICP-AES. 4 Results and discussion 4.1 Cementation of waste Fig.4......
; Si-Cr共渗; 涂层形成机理; Ti-Nb-Si based high temperature alloy; pack cementation; Si-Cr co-deposition; formation mechanism; [全文内容正在添加中] ......
and pack cementation was a C/SiC gradient layer acting as bonding layer,and the exterior coating formed in the second pack cementation was a Si-SiC double phase coating.Oxidation tests at 1873 K......
; 文献标识码:A Structure formation of co-deposition of Si and Al coatings on advanced Nb-based ultrahigh temperature alloy by pack cementation process TIAN Xiao-dong, GUO Xi-ping...). Key words: Nb-based ultrahigh temperature alloy; pack cementation; Al-modified silicide coating ......
and TiAl2. Key words: hot corrosion; TiAl alloy; pack cementation; anodization; halogen effect 1 Introduction Till now, much effort has been devoted to improving the mechanical properties and oxidation... coating was firstly prepared on TiAl alloy by pack cementation. Then, anodization in a fluorine- containing solution and pre-oxidation in air were conducted in sequence (Fig. 1). The aluminizing......
