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其抗高温氧化能力[3]. 早在20世纪40年代就出现了航空发动机防护涂层的报道,经过几十年的研究,高温涂层材料的成分与结构等方面均有了巨大的改进.根据成分的选择,结构的优化,可以将高温涂层的发展经历简单地划分为以下几个时期: 第1代涂层,20世纪60年代研制成功了β-NiAl基铝化物涂层.但NiAl相脆性大,易开裂,Al原子向基体扩散快, 涂层使用寿命短. 第2代涂层,20世纪70年代出现了改进型铝化物涂层,如Al-Cr,Al-Si,Al-Ti,Pt-Al,其中以镀Pt渗Al形成的铂铝化物涂层具有更长的使用寿命而倍受欢迎,进而成为研究的热点,至今仍有相关报道. 以上两代涂层均属于扩散涂层, 这些涂层在航空发动机上得到了一定的应用[4-5] . 第3代涂层,20世纪80年代发展了可以调整涂层成分,能在更高温度下起到高温抗氧化作用的等离子体喷涂MCrAlY涂层(M代表Fe,Co,Ni......
) and independent parameters (pH value, pulp density and initial ferrous concentration) were investigated at the 1st, 4th, 9th, 14th and 22nd days. According to the preliminary tests and based on some experiments......
, 27(2): 282-288. SHEN Ding, YANG Shao-bin, LI Si-nan, SUN Wen, TANG Shu-wei. Calculation and prediction of lithium insertion properties and elastic properties for Sn-Li alloy based on first-principle... behavior of titanium carbide-based MXenes depending on the functional group in Li S batteries: A density functional theory study[J]. Journal of Power Sources, 2017, 342: 64-69. [46] PENG H J, ZHANG G......
at high temperature to form pervoskite structure. LAMMINEN et al [12] used La(NO3)3 and Ni(NO3)2 as starting materials, which were dissolved into deionized water in proportion, forming cocrystallization after evaporation of water, and then annealed in air at 900 °C for 24 h to obtain pure perovskite LiNiO3. XIA et al [13] adopted this method, in which La(NO3)3·6H2O, Co(C2H3O2)2·4H2O and Mn(C2H3O2......
显微测温学的系统研究,结合阴极射线激发荧光(CL)图像,建立流体包裹体形成的相对时序与矿物生成顺序的关系.在此基础上,运用LA-ICP-MS分析技术,精确测定各世代单个流体包裹体中主量元素(如K,Na,Ca,Mg等)和成矿元素(如Cu,Pb,Zn,Au,As等)的组成,可以提取由成矿流体成分变化所反映的成矿过程等方面的重要信息.显微红外测温技术在矿床研究中得到了重要的应用.热液矿床中大多数金属矿物.... [33] 翟裕生. 按成矿系列思路找寻铜-金矿床[J]. 有色金属矿产与勘查, 1994, 3(3): 158. ZHAI Yu-shen. Search for copper-gold deposits based on metallogenic series[J]. Geological Exploration for Non-ferrous Metals, 1994, 3(3): 158......
solutions of Sarcheshmeh Copper Mine containing Cu (770 mg/L), Ni (3200 mg/L), Fe (800 mg/L) and Zn (200 mg/L) were comprehensively investigated using D2EHPA, LIX 984, Cyanex 302, Chemorex CP 150 and Acorga... by the hydrometallurgical method [1-3]. Solvent extraction is based on a variety of organic solvents. The extractants with different formulae have been produced and utilized in order to extract elements......
, 2020, 34(6): 6696-6734. [10] 许迪恺, TONG Andrew, 曾亮, 等. 铁基移动床化学链技术进展[J]. 化工学报, 2014, 65(7): 2410-2416. XU Dikai, TONG Andrew, ZENG Liang, et al. Development on iron-based moving bed chemical looping... Yanyan, YANG Song, et al. Iron-based oxygen carriers in chemical looping conversions: a review[J]. Carbon Resources Conversion, 2019, 2(1): 23-34. [31] KALE G R, KULKARNI B D, BHARADWAJ K V. Chemical......
of the tailings had a particle size less than 21 μm, 90% of the particle diameters were less than 223 μm, and the volume-based particle size was defined as coarse-grained [33, 34]. Figure 1 Particle size distribution of tailings The X-ray diffraction pattern (Figure 2) and the mineral composition (Table 1) demonstrated that the main mineral compositions of tailings are CaCO3, FeCO3, SiO2, and Ca(Mg, Fe......
on risk assessment method of disaster chain based on complex network[J]. Systems Engineering-Theory & Practice, 2015, 35(2): 466-472. [51] 许 洁, 吴 超. 安全人性学的学科体系研究[J]. 中国安全科学学报, 2015, 25......
