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J. Cent. South Univ. (2019) 26: 3372-3387 DOI: https://doi.org/10.1007/s11771-019-4260-y Coupling effect of evaporation and condensation processes of organic Rankine cycle for geothermal power..., cooling water temperature difference and pinch point temperature difference are often fixed according to engineering experience. In order to optimize the ORC system comprehensively, the coupling effect......
J. Cent. South Univ. Technol. (2008) 15: 429-433 DOI: 10.1007/s11771-008-0080-1 Influence of Tb substitution on low-field magnetocaloric effect in Gd5Si1.72Ge2.28 alloy DENG Jian-qiu(邓健秋)1... 4 times as large as that of (Gd0.3Dy0.7)5Si4 compound (|?Smax| = 2.24 J/(kg?K), TC = 198 K). Key words: rare earth alloy; magnetic entropy change; magnetic phase transition; magnetocaloric effect......
J. Cent. South Univ. (2020) 27: 3839-3851 DOI: https://doi.org/10.1007/s11771-020-4503-y Torsional dynamic response of tapered pile considering compaction effect and stress diffusion effect GUAN..., Changsha 410075, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Considering both the compaction effect of pile surrounding soil......
Ti-Al系金属间化合物多孔材料的制备和性能 江垚1,黄虎军1,黄伯云1,徐南平2,贺跃辉1 (1.中南大学粉末冶金国家重点实验室,长沙,410083;2.南京工业大学膜科学技术研究所,南京,210009) 摘要:使用粉末冶金模压成形和无压反应烧结方法,制备出Ti-Al系金属间化合物多孔材料,研究了铝含量对其孔隙形成机理以及孔结构性能的影响.结果表明:烧结后Ti-Al合金坯块发生了显著的体积膨胀;最大孔径和开孔隙率都随着铝含量的增加而增大,当铝含量(质量分数)超过60%时,总孔隙率出现下降趋势;Kirkendall效应导致的钛铝元素偏扩散反应是体积膨胀和孔隙形成的主要原因. 关键词:金属材料; Ti-Al金属间化合物; 多孔材料; Kirkendall效应; 膨胀行为; [全文内容正在添加中] ......
Ti-22Al-26Nb合金的高温氧化行为 高春香1,张英1,王蕾1,王淑菊1,赵书彦1,张学军1 (1.沈阳化工学院,辽宁,沈阳,110142) 摘要:采用热重法研究Ti-22Al-26Nb合金在800和900 ℃的高温氧化行为.利用X射线衍射分析(XRD),扫描电镜(SEM)对氧化膜的相组成和形貌进行分析.结果表明:在氧化初期该合金遵循抛物线规律,而20 h以后,合金的氧化动力学符合直线规律.氧化后的产物主要由TiO_2,AlNbO_4和Nb_2TiO_7组成,氧化膜出现了分层结构且氧化温度愈高,分层愈明显. 关键词:Ti-22Al-26Nb; 高温氧化; Nb的影响; Ti-22Al-26Nb; high temperature oxidation; effect of Nb; [全文内容正在添加中] ......
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Large Magnetic Entropy Effect in La2/3Ca1/3MnO3 彭振生1 (1.Department of Physics,Suzhou Advanced Normal College,Suzhou 234000,China) Abstract:The magnetocaloric effect in the colossal...; magnetocaloric effect; colossal magnetoresistance; perovskite; entropy; rare earths; [全文内容正在添加中] ......
corrosion; galvanic effect .... This was consistent with the view of GOTTSCHALK et al[16] that one sulfide will be significantly oxidated because of different static potentials, while the other will be protected for galvanic effect. In acidic......
Metallurgy, Central South University, Changsha 410083, China) Abstract: The irregular particle may melt rapidly and then retract to spherical particle through balling effect by laser beam scanning... between spreading and retracting is crucial to the balling process, and the ideal balling effect occurs only under the condition of good combination of process parameters, powder feature and environment......
rate range from 1.33×10-4 s-1 to 6.66×10-4 s-1, this alloy shows positive strain rate sensitivity (SRS). Most importantly, the Portevin-Le Chatelier(PLC) effect which is an interesting and dominant.... Additionally, the effect of dynamic strain aging (DSA), and the main mechanism for the onset of PLC phenomenon during tension, will be weakened because the strengthened obstructing influence of twins......
