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°C were studied by simultaneous thermal analysis and the TG/DSC curves before and after the pre-oxidation were compared. By the peak temperature of DTG curves, the whole reaction process for each...Spontaneous combustion tendency of fresh and pre-oxidized sulfide oresYANG Fu-qiang(阳富强)1, WU Chao(吴超)2, LI Zi-jun(李孜军)2(1. College of Environment and Resources, Fuzhou University, Fuzhou 350108......
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J. Cent. South Univ. Technol. (2011) 18: 1418-1424 DOI: 10.1007/s11771-011-0856-6 Effect of chloride ion on bacterial pre-oxidation of arsenic-containing gold concentrate YANG Wei(杨玮)1, QIN Wen... Abstract: The bacterial pre-oxidation process of arsenic-containing gold concentrates and the bacterial activity under different chloride ion concentrations were studied by using a mixture......
码:A Preparation of NiO/NiFe2O4 coatings by electrophoresis and pre-oxidation diffusion treatment and their formation mechanism CHANG Tong1, LI Zhi-you1, MA Li1, CHANG Yuan2, ZHOU Ke-chao1 (1. State...) Abstract: Electrodeposition-electrophoretic deposition (EPD) technique was employed for fabricating the ferric oxide (Fe2O3) thick films on the Ni-based superalloy, and then pre-oxidation processing......
(EDAX)分析涂层试样物相分布及元素组成. 2 结果与分析 2.1 预氧化前后C/C复合材料微观结构形貌 将未经预氧化的试样命名为WOP(Without pre-oxidation),预氧化处理的试样命名为WP(With pre-oxidation).图1(a)所示为试样WOP微观结构形貌,材料经反复打磨后表面较为平整,炭纤维被连续密实的热解炭包裹,但炭纤维/热解炭界面上依然存在...; Surface morphologies of C/C composites before and after pre-oxidation 由于受炭纤维与热解炭热膨胀系数不匹配及制备工艺等因素影响,炭纤维/热解炭界面处存在较多缺陷,这些缺陷处将附着大量易受氧分子化学进攻的活性碳原子,故氧化反应最先发生在纤维和基体界面处[18].因此,C/C复合材料中的炭纤维/热解炭界面是复合材料中的"高能地带",这......
Trans. Nonferrous Met. Soc. China 25(2015) 3305-3314 Effects of vacuum pre-oxidation process on thermally-grown oxides layer of CoCrAlY high temperature corrosion resistance coating Yu-jun HAN1,2.... School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Received 27 October 2014; accepted 20 March 2015 Abstract: The influence of the certain specific vacuum pre-oxidation......
Influence of Pre-oxidation on the Hot Corrosion of DZ68 Superalloy in the Mixture of Na2SO4-NaClEnze Liu,Zhi Zheng,Xiurong Guan,Jian Tong,Likui Ning and Yongsi Yu Institute of Metal Research,Chinese... with high ratio of thrust-mass.In order to investigate the influence of pre-oxidation on the hot corrosion resistance of DZ68 alloy,pre-oxidation treatment was conducted at 950℃ in air for 20 h.A mixture......
Complete stabilization of severely As-contaminated soil by a simple H2O2 pre-oxidation method combined with non-toxic TMT-15 and FeCl3·6H2OChang-sheng Yue1,2,Ben Peng1,2,Wei Tian1,2,Guang-hua...) presented a better stabilization behavior than either stabilizer used individually. The use of the H2O2 pre-oxidation assisted TMT-15 and FeCl3·6 H2O stabilization approach not only converted......
以抗坏血酸作还原滴定剂电位滴定法测定铁矿石中全铁戚淑芳1,张杰1,王莹1,宁松1(1.辽宁省鞍山市鞍钢股份公司技术中心)摘 要:提出了以抗坏血酸作为还原滴定剂,全自动电位滴定仪判定滴定终点的测定铁矿石中全铁的方法.对滴定酸介质和酸度,温度,电位滴定仪参数进行了优化,对干扰元素的影响等进行了试验.结果表明,全铁可在铁矿石溶样的酸介质及酸度下滴定,无需进行酸度调节,滴定的温度范围为50~80℃.采用过氧化氢或过硫酸铵作预氧化剂,过量的预氧化剂煮沸数分钟即可除去,操作简便.铁矿石中大多数元素均不干扰测定,尤其是铜,钼......
. The reduction behaviour of composite pellets has also been found better than that of pre-oxidized pellets indicating the former to be more efficient. Key words: ilmenite; composite pellet; pre-oxidation...-oxidation process enhances the reduction of iron oxides present in the ilmenite. For example, ZHANG et al [10] reported that pre-oxidation increased the attainable extent of the reduction of iron......
