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with copper oxide nanoparticles among others. The review published by LIU et al [7] presented experimental results obtained for the heat pipe and nanofluid combination applied to several kinds... by this heat pipe. Newer reviews were published by BUSCHMANN [8] and SURESHKUMAR et al [9], and also obtained similar results regarding the heat transfer performance. The existing analytical studies......
to the excessive consumption of the outer Cr-Al-Si alloy coating and there are also some defects appearing in the SiO2 glass layer. SHI et al [67] prepared a La-Mo-Si-O-C coating on the surface of porous SiC pre... coating material systems and coating technologies were utilized to fabricat a good oxidation resistance coating. MORIMOTO et al [27] designed a multilayer coating consisting of a SiC inner layer......
surface after 27 years of construction. Another example of this acid attack is reported by LI et al [8] where a severe corrosion issue of cement-based structures by sulfuric acid was observed... indicated that the acid resistance of concrete can be noticeably enhanced [15-17]. TORRI et al [15] investigated the acid resistance of mortar samples and found that the 10% substitution of cement......
100%的Cu和95%的Li被浸出,Mn的浸出率也超过了70%,而Al,Ni以及Co的浸出率只有40%左右.经分析发现,黑曲霉代谢活动中产生的有机酸主要包括柠檬酸,苹果酸,草酸和葡萄糖酸等,其中柠檬酸对金属的浸出率贡献最大. 尽管通过一些离子的催化作用或者改变菌种体系可以使一些金属的浸出率显著提高,但生物浸出方法仍然难以在工业中大规模应用,其原因是:一方面,菌种难培养不易存活,对生长环境要求高;另...现Co,Ni以及Cu的高效浸出,而Mn和Al基本不被浸出. 2.5 辅助强化浸出 一般地,酸浸出和氨浸出都需要较长的浸出时间和较高的浸出温度.为了提高金属的浸出效率,可采用一些辅助方法来增强浸出.常见的辅助浸出手段有超声辅助以及机械化学辅助[71-72]. JIANG等[71]以H2SO4作为浸出剂,H2O2作为还原剂从废旧LiCoO2中浸出Li和Co.在浸出温度为30 ℃和浸出时间为30 min......
算 常用的载氧体为Fe,Co,Ni,Cu和Mn的氧化物,在600~1 200 ℃下CH4与常见氧化物的反应热力学数据如图3所示,lg K越大说明金属氧化物与CH4反应越容易,MnO2/Mn2O3,Mn2O3/Mn3O4,Co3O4/CoO,CuO/Cu2O比Fe2O3/Fe3O4和NiO/Ni更容易氧化CH4,并且Fe2O3/Fe3O4,Mn2O3/Mn3O4,CuO/Cu2O和NiO/Ni都可以... promoters on the performance of Fe2O3/Al2O3 oxygen carrier[J]. Applied Energy, 2016, 165: 685-694. [69] IMTIAZ Q, S. YUZBASI N, M. ABDALA P, et al. Development of MgAl2O4 -stabilized, Cu-doped, Fe2O3-based......
Technique overview Binder jetting (BJ) was developed by SACHS et al in 1993 [4]. It is also known as the 3DP method. This technology involves inkjet nozzle, which sprays the binder on the plastic powder... mechanical and thermal properties, such as jet engine structural components, brake system components. RABINSKIY et al [9] presented the research of binder jetting technology to fabricate porous silicon......
Zhi-guang, et al. Reduction kinetics of Fe2O3-NiO composites for production of Fe/Ni alloy using hydrogen under non-isothermal conditions[J]. The Chinese Journal of Nonferrous Metals, 2017, 27(1...:郭学益, 陈远林, 田庆华, 等. 氢冶金理论与方法研究进展[J]. 中国有色金属学报, 2021, 31(7): 1891-1906. DOI: 10.11817/j.ysxb.1004.0609.2021-40038 GUO Xue-yi, CHEN Yuan-lin, TIAN Qing-hua, et al. Research progress on hydrogen......
factor and penetration rate [32]. A review of rockbursting during TBM tunneling in hard rock and coal mines is presented by ZHENG et al [7]. For railway and hydropower engineering where the overburden... forces from rock blocks. Cutters today can either incorporate hard, fine grained carbides into the matrix of the disc material or apply a hardened coating of alloy powder on the steel substrate......