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, et al. Fatigue crack growth behavior of GH4742 alloy[J]. The Chinese Journal of Nonferrous Metals, 2017, 27(9): 1823-1831. [8] LI Yun-li, WU Wen-ping, LI Na-nin, et al. Cohesive zone representation... A, et al.. In-situ SEM study of slip-controlled short-crack growth in single-crystal nickel superalloy[J]. Materials Science and Engineering A, 2018, 742: 564-572. [35] LI Zhen-wei, WEN Zhi-xun, GU......
and material alternatives have also been delineated in Appendix 1. JEE et al [48] used the TOPSIS method to develop an interactive program based on Visual Basic programming language. The interactive program.... They highlighted the requirement of a more systematic design tool that could systematically map the requirements to performance index or material properties. MILANI et al [49] evaluated the effect......
, WANG Ri-chu, PENG Chao-qun, LI Ting- ting, LUO Yu-lin, WANG Chao, LIU Bing (School of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: The research... for aqueous gelcasting alloy Ni-362-3 STAMPFL等[65]将MoldSDM(Mold shape deposition manufacturing)模具制造工艺与凝胶注模成型技术相结合,在快速分层制备的腊模内通过浇注高固相体积分数的金属粉末料浆,成功制备出形状复杂的不锈钢叶轮,烧结后该叶轮的微观结构及力学性能优良,可与传统粉末冶金工艺制件媲美.图......
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......
, 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...(vdW),全面地研究各种掺氮型碳材料与多硫化锂之间的有效锚定作用,结果发现吡啶型氮掺杂的石墨烯团簇更有效抓固多硫化锂(见图1(a)),其他研究者也发现氮掺杂石墨烯有利于吸附多硫化物得到相似结论[32-33].另外发现石墨烯中氧元素存在也有利于多硫化锂的吸附[34-35]. 碳质材料的双掺杂多数在N,B,O,P等元素中筛选.LI等[36]计算N,B共掺杂石墨烯复合正极对多硫化物的吸附过程发现在Li......
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......
into the defects in the substrate. LI et al [37] prepared a MoSi2-CrSi2-Si coating on the surface of the SiC pre-coated C/C composites. The coating obtains an excellent anti-oxidation capability... 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......
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......
CH4/CO2转化工艺的实现需要设计能够实现铁基载氧体深度还原,燃料高效转化的燃料反应器,CH4和CO2需要转化率在大规模反应装置进一步证实. 参考文献: [1] 苏小平, 王力, 杨武, 等. 甲烷化学链重整制合成气的研究进展[J]. 地下水, 2017, 39(4): 198-202. SU Xiaoping, WANG Li, YANG Wu, et al. Chemical looping...] LI Danyang, XU Ruidong, GU Zhenhua, et al. Chemical-looping conversion of methane: a review[J]. Energy Technology, 2020, 8(8): 1900925. [38] TANG Mingchen, XU Long, FAN Maohong. Progress in oxygen......
