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Trans. Nonferrous Met. Soc. China 28(2018) 469-486 Co evolutions for WC-Co with different Co contents during pretreatment and HFCVD diamond film growth processes Xin-chang WANG1, Cheng-chuan WANG1...% and 12%, mass fraction). Based on the XPS and EDX, from orthogonal pretreatment experiments, it is indicated that the acid concentration, the time of the acid pretreatment and the original Co content......
Trans. Nonferrous Met. Soc. China 27(2017) 1888-1895 Mineralogical characterization and pretreatment for antimony extraction by ozone of antimony-bearing refractory gold concentrates Xue-yi GUO1,2... and stirring speed on the extraction of antimony were investigated. High antimony extraction (93.75%) is achieved under the optimized conditions. After the pretreatment by ozone, the antimony......
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号:TD921 文献标志码:A Pretreatment of refractory gold-bearing sulfur concentrates by microwave roasting CHEN Wei1, 2, DING De-xin1, 2, HU Nan2, LI Feng1, 2 (1. School of Nuclear..., and the leaching rate after microwave pretreatment increases greatly than that of raw ore rate (9.82%). With the XRD and SEM technology analyzing mineral composition and surface morphology, roasted sample......
出行为进行解析. 关键词:钴白合金;碱焙烧;脱硅;预处理;常压浸出 中图分类号:TF811;TF816 文献标志码:A Alkali-roasting and desilication pretreatment of refractory high... by sulfuric acid because of its complex structure. The pretreatment of alkali-roasting and desilication was carried out to destroy the stable ferro-silicon alloy structure. The results show......
H2SO4 concentration 0.70 mol/L, leaching time 24 h, ratio of liquid to solid 5?1 and stirring rate 750 r/min. Key words: copper-bearing gold ores; pretreatment; chemical oxidation; leaching 含铜金矿石属于难..., NIE Guang-hua, ZHANG Qiang. Present situation and developmental trend of pretreatment and leaching technology for refractory copper-bearing gold ores [J]. Gold, 2005, 8(26): 30-33. [3] LU Z Y, MUIR D......
that the coating has an excellent anti-corrosion property. Key words: Mg-Li alloy; pretreatment; electroless plating; Ni-P coating; corrosion resistance 1 Introduction Mg-Li alloys are among... on their surfaces [13]. It is, therefore, necessary to remove all contamination from their surfaces to get a good protective coating. Table 1 shows the compositions of the pretreatment solutions......
pretreatment; coating layer; pseudobohemite; combination performance; [全文内容正在添加中] ......
微硬度为458 HK,明显高于镁合金基材的硬度(77 HK),同时镀层的耐蚀性也有较大的提高. 关键词:Ni-B化学镀层; 镁合金; 预处理; 微观组织; 耐蚀性能; electroless Ni- B coating; Mg alloy; pretreatment; microstructure; corrosion resistance; [全文内容正在添加中] ......
用MPCVD法在WC-Co刀具上沉积金刚石薄膜 余卫华1,刘桂珍1,周健1,王念1,李力1 (1.武汉理工大学) 摘要:研究了硬质合金基体的预处理对金刚石沉积的影响,并确定了用MPCVD法在WC-Co刀具上沉积金刚石薄膜的工艺参数.采用了一些提高成核密度和沉积速率的方法,用SEM,XRD和Raman对金刚石薄膜的性质进行了分析.结果表明,合适的预处理可以有效的抑制钴的溢出并提高薄膜的质量. 关键词:金刚石薄膜; WC-Co刀具; 微波等离子体; 基体预处理; [全文内容正在添加中] ......