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J. Cent. South Univ. (2021) 28: 1637-1651 DOI: https://doi.org/10.1007/s11771-021-4723-9 Sintering behavior and mechanical properties of sintered ceramics based on spodumene tailings YANG Jie(杨洁)1...-qian, XU Yan-bo, LUO Li-ping, TANGZhen. Sintering behavior and mechanical properties of sintered ceramics based on spodumene tailings [J]. Journal of Central South University, 2021, 28(6): 1637-1651......
equation applied to an external return spherical hinge pair was deduced based on the vector equation of relative-motion velocity of the external return spherical hinge pair under the influence of external... at the speed of 1500 r/min and working pressure of 31.5 MPa. The external retainer plate is made of 42CrMo alloy steel, while the external spherical hinge is made of steel 45 and plated with brass on its inner......
层的强度极限时,铝层开始颈缩并产生裂纹,同时界面裂纹沿拉伸方向迅速扩展,随后IF钢单独伸长变形直至断裂.王传杰等[12]研究了Cu/Ni复合箔的界面变形行为,基体层间的力学性能差异导致Cu/Ni界面的微孔缺陷处最先萌生裂纹,当界面裂纹大量合并和纵向扩展时,基体层开始发生颈缩和断裂.皇涛等[13]通过扫描电镜表征研究了钛/铝复合板原位拉伸加载过程的损伤演化行为,裂纹在复合界面区的金属间化合物层中萌生... Fang-fang, et al. Interactive effects of microstructure and interface on tensile deformation behaviors of Cu/Ni clad foils[J]. Materials Science and Engineering A, 2018, 714: 14-24. [13] 皇 涛, 王 锟, 陈拂晓......
Journal of Fatigue, 2010, 32(9): 1461-1472. [6] KEVINSANNY O S, TAKAKUWA O, OGAWA Y, et al. Effect of defects on the fatigue limit of Ni‐based superalloy 718 with different grain sizes[J]. Fatigue... Shu-ning, et al. In-situ observation of crack initiation and propagation in Ni-based superalloy with film cooling holes during tensile test[J]. Journal of Alloys and Compounds, 2019, 793: 65-76. [36......
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...的工业化方向发展. REFERENCES [1] JANNEY M A. Method for molding ceramic powders: US 4894194[P]. 1990-01-16. [2] JANNEY M A, OMATETE O O. Method for molding ceramic powders using a water-based gelcasting......
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...对于热障涂层的使用寿命非常重要.合金组元中Ni,Co或Ni+Co是涂层的基体元素, Co的抗热腐蚀性能优于Ni, 但抗氧化性能不如Ni, Ni+Co的组合有利于涂层的综合抗腐蚀(氧化)性能；并且Co质量百分比在20%~26%时, Ni+Co组合的涂层具有最佳的韧性.组元中Cr是用于保证涂层的抗热腐蚀 性,Al是用于提供涂层的抗氧化性.在Ni基高温合金中, Cr和Al都是固溶强化元素, Al还是γ......
of graphite substrate. The selection of coating includes the coating materials system and the preparation techniques. In addition, attention also should be paid to the anti-oxidation mechanism. SiC based... occurring in the thermal shocking tests. The dual- layer SiC coating can effectively improve the oxidation resistant property of MG sphere at the temperature up to 1773 K for 200 h and could understand more......
J. Cent. South Univ. (2020) 27: 3821-3838 DOI: https://doi.org/10.1007/s11771-020-4473-0 Performance evaluation of nano-silica and silica fume on enhancing acid resistance of cement-based...-based composites for underground structures [J]. Journal of Central South University, 2020, 27(12): 3821-3838. DOI: https://doi.org/10.1007/s11771-020-4473-0. 1 Introduction For underground structures......
Ni-Co-Mn-H2O的电位E-pH图可知[45],高价态的Co和Mn化合物无法以离子的形态在水溶液中存在.因此,在浸出过程中,往往要添加还原剂将Co和Mn从高价氧化物相还原成易溶于水的低价态Co2+和Mn2+,以提高它们的浸出率.由于Cl-具有还原性,可以将Co或Mn从高价态还原为低价态,以HCl作为浸出剂,浸出率较高[46-47],但在浸出过程中会有Cl2生成(以LiCoO2为例,反应如式(2...还原剂有葡萄糖[54],淀粉[55],抗坏血酸[56]等.当前使用最多的还原剂是H2O2.以LiCoO2为例,当使用H2O2作为还原剂时,反应如下: (3) GAO等[57]对比了添加还原剂H2O2前后金属元素浸出率变化,并从浸出动力学角度对其机理进行了解释,结果表明:当添加体积分数6%的H2O2时,在同等条件下,Ni,Co和Mn的浸出率由不加还原剂时的30%左右提升至97%以上；当存在还原剂时......
technology has made it possible to produce structural ceramics materials with highly complex geometric shapes and interconnected pores. Simultaneously, the use of 3D-printing technology based on light curing... in Figure 4 [10]. The ceramic samples’ porosity using expoxy-based and water-based binders is about 60% and 70%, respectively. The advantage of this technology is to avoid the problem of powder......
