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Volume 46 期 10，2026 2026年第46卷第10期

  • Current Recommendation

    ZHU Chongwei, ZHANG Zhipeng, WANG Jiajian, LIU Jide, LI Jinguo

    DOI：10.15980/j.tzzz.Y20260009
    摘要：Nickel-based single crystal superalloys are key materials for turbine blades in aero-engines， while high Re content leads to prohibitive costs. The research progress in low-cost nickel-based single crystal superalloys was reviewed centred on "composition-process-microstructure-property". Alloys are divided into second-generation modified types， Re-free innovative type and multi-generation cross-domain type， which achieve strengthening through the synergistic replacement of Re by W， Mo and Ta. Tensile properties are characterized by medium-temperature peak and high-temperature attenuation. Creep properties are regulated by precipitation strengthening， solid solution strengthening， lattice mismatch and diffusion coefficient. Oxidation resistance relies on the protective layer formed by Al， Cr and Ta， and a coupling effect is generated between oxidation and fatigue. Finally， emerging methods such as machine learning and multi-scale simulation were prospected， aiming to provide theoretical references for research and development of low-cost and high-performance single crystal superalloy.  
    关键词：Ni-based Single Crystal Superalloy;Creep Properties;Composition Design;Oxidation Resistance   
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    ZHANG Yubo, JI Junkai, YANG Xi, BAI Qingling, LIU Dehua

    DOI：10.15980/j.tzzz.Y20260006
    摘要：To improve the interfacial bonding quality of carbon fiber reinforced aluminum-matrix composites， a strategy combining electroless copper plating process and hot-pressing regulation was developed. The results indicate that island-like protrusions and uncoated defects on the carbon fiber surface are effectively eliminated by taking sodium dodecylbenzene sulfonate as dispersant combined with pH value of electroless plating solution， leading to a continuous and smooth copper coating. On this basis， copper coating diffusion can be induced at 600 ℃ by adjusting hot-pressing sintering temperature， resulting in a fine Al2Cu phase（0.92 µm）， which improves the interfacial bonding. The tensile strength of composites is 169% higher than that of pure aluminum with carbon fiber volume fraction of 2.6%， and the fiber reinforcement efficiency reaches 95.1%. The failure behavior is characterized by mixed mode of fiber pull-out and direct fiber-cutting.  
    关键词：Carbon Fiber Reinforced Al-matrix Composite;Electroless Copper Plating;Interfacial Diffusion;Mechanical Properties   
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    更新时间：2026-10-16

  • Research·Review

    WANG Mengqian, GAO Tian

    DOI：10.15980/j.tzzz.T20250408
    摘要：With the advancement of modern refrigeration technology， magnetic refrigeration based on magnetocaloric effect has emerged as a promising alternative due to its high efficiency， energy savings， and environmental friendliness. Ni-Mn-Sn-based Heusler alloys have become a research focus owing to their non-toxicity， absence of expensive elements， and superior magnetocaloric properties. The crystal structure， phase transformation behavior， and fundamental theory of Ni-Mn-Sn-based alloys were systematically summarized， and regulatory effects of chemical composition and preparation processes on magnetocaloric performance were emphasized. Finally， future research directions were prospected， including the synergistic optimization of multi-element doping and microstructure design and exploration of novel preparation techniques.  
    关键词：Ni-Mn-Sn-based Alloys;Magnetocaloric Effect;Element Modulation;Process Optimization   
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    更新时间：2026-10-16

    QIAN Xiaoming, ZHANG Xiangyang, XU Yifei, WANG Zhaodong, XU Guangming, MENG Longzhou, TANG Hongqun, LI Yong, BAI Qingling, WANG Haoyu

    DOI：10.15980/j.tzzz.T20250382
    摘要：Optimizing the solidification process to enhance alloy properties has become a key breakthrough point in contemporary research. Inducing external electromagnetic fields offers a novel approach to regulating solidification processes， and precise control over solidification can be achieved through influencing melt flow， heat transfer， and phase transformation behaviors， thereby improving product quality. Influence mechanisms of various types of electromagnetic fields on solidification microstructure were analyzed systematically， and impact mechanisms of electromagnetic field on solidification process were reviewed domestically and abroad. The influence law and action mechanisms of electromagnetic field intervening solidification were examined based on the essence of metal solidification and parameters for electromagnetic field， and relevant technologies of metal solidification involving electromagnetic fields were reviewed.  
    关键词：Electromagnetic Field;Metal Solidification;Grain Refining   
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    更新时间：2026-10-16

  • Research·Composites

    QIU Yilin, YAN Yifan, ZHU Zhiyuan, WU Haoran, SONG Zhikai, ZHANG Lianshuang, HUANG Hailong

    DOI：10.15980/j.tzzz.T20260007
    摘要：Cu-30TiBx composites were fabricated via hot-press sintering， and effects of molar ratio of B to Ti on characteristics of in-situ ceramic particles as well as mechanical and conductive properties of the composites were systematically investigated. The results indicate that in-situ generated ceramic particles exhibit adequate interfacial bonding with matrix in Cu-Ti-B system. With increasing molar ratio of B to Ti， the particle morphology is gradually transformed from regular hexagonal prisms to truncated hexahedra and even near-spherical shapes， while the strength and hardness of composites are decreased with enhanced plasticity. Compared with Cu-TiB₂， the yield strength and compressive strength of Cu-TiB₁.₈ are increased from 964.8 MPa and 1 109.6 MPa to 1 325.2 MPa and 1 443.9 MPa， respectively， whereas the fracture strain of Cu-TiB₂.₂ is raised from 7.03% to 8.81%. Meanwhile， the conductive properties of composites show similar trend to that of plasticity， where thermal conductivity and electrical conductivity of TiB2.2 system are enhanced by 82.5% and 106.9%， respectively， compared with those of TiB₂ system.  
    关键词：Cu Matrix Composites;In-situ Synthesis;Particle Characteristics;Mechanical Properties;Conductive Properties   
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    更新时间：2026-10-16
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