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轧制化学气相沉积钨的抗瞬态高热负荷性能研究
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1.四川大学原子核科学与技术研究所;2.核工业西南物理研究院;3.北京理工大学材料学院

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国家自然科学基金资助(项目号12375204)


Study on the transient high heat load resistance performance of rolled chemical vapor deposition tungsten
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1.Institute of Nuclear Science and Technology,Sichuan University;2.School of Materials Science and Technology,Beijing Institute of Technology

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    摘要:

    核聚变反应堆中的高热负荷时刻威胁着面向等离子体材料的服役安全,开发能够对抗瞬态热冲击的新型钨材料对加速聚变能源的应用进程至关重要。本研究突破了传统的粉末冶金制坯后热加工的商业钨材制备流程,提出了一种创新工艺:首先采用化学气相沉积(CVD)技术制坯,然后进行交叉轧制,旨在制备性能更优越的钨材料。我们对不同轧制变形率的新型钨材及传统钨材进行了微观结构、热导率、力学性能和电子束热冲击等全面的测试。结果表明:低轧制变形率的钨存在<100>∥ND织构,具备较高的热导率。同时,该材料晶粒间小角度晶界的比例高达78.8%,能够在高温区获得较好的综合力学性能。良好的导热和力学性能使得其抗瞬态热冲击开裂阈值为0.44-0.55 GW/m2,远超传统材料。

    Abstract:

    The high heat load in nuclear fusion reactors constantly threatens the service safety of plasma materials. Developing new tungsten materials that can resist transient thermal shock is crucial for accelerating the application of fusion energy. This study breaks through the traditional commercial tungsten material preparation process of powder metallurgy billet and hot processing, and proposes an innovative process: first, chemical vapor deposition (CVD) technology is used to prepare billets, and then cross rolling is carried out, aiming to prepare tungsten materials with superior performance. We conducted comprehensive tests on the microstructure, thermal conductivity, mechanical properties, and electron beam thermal shock of new and traditional tungsten materials with different rolling deformation rates. The results indicate that tungsten with low rolling deformation rate has<100>∥ND texture and high thermal conductivity. At the same time, the proportion of small angle grain boundaries between the grains of the material is as high as 78.8%, which can achieve good comprehensive mechanical properties in the high temperature zone. Good thermal conductivity and mechanical properties result in a transient thermal shock cracking threshold of 0.44-0.55 GW/m2, far exceeding traditional materials.

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赵天宇,文攀,封范,王健豹,练友运,刘翔,谭成文,唐军,都娟.轧制化学气相沉积钨的抗瞬态高热负荷性能研究[J].稀有金属材料与工程,,().[Zhao Tianyu, Wen Pan, Feng Fan, Wan Jianbao, Lian Youyun, Liu Xiang, Tan Chengwen, Tang Jun, Du Juan. Study on the transient high heat load resistance performance of rolled chemical vapor deposition tungsten[J]. Rare Metal Materials and Engineering,,().]
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  • 收稿日期:2024-11-01
  • 最后修改日期:2025-02-28
  • 录用日期:2025-03-05
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