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国家自然科学基金(11102221)

作品数:4 被引量:4H指数:1
相关作者:张卫卫黎颖薛晓艳杨党校陈顺礼更多>>
相关机构:四川大学西南交通大学成都大学更多>>
发文基金:国家自然科学基金国家磁约束核聚变能发展研究专项国家重点基础研究发展计划更多>>
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直线等离子体装置中氩等离子体热负荷特性研究被引量:2
2015年
利用自建的单阴极直流弧光放电直线等离子体装置研究了氩等离子体的稳态热负荷特性,拟为研究等离子体性质、及其与壁材料相互作用提供一定的参考。研究表明,实验中产生的氩等离子体热负荷可达0.5 MW/m2,能持续稳定放电5h以上;氩等离子体热负荷与输入功率成正比,热效率随输入功率的增加而增大;等离子体热负荷强烈依赖于磁场和气体流量,磁场越强、流量越高热负荷越大;同时,增加气体流量或增强磁场,均可显著提高等离子体热效率。通过测量相同条件下距离阳极等离子体喷口215和430mm处的热负荷发现,两处热负荷相差2倍,表明在轴向上热负荷与距离成反比。
欧巍曹小岗薛晓艳张卫卫王建强杨党校陈顺礼黎颖苟富均
关键词:热负荷热效率功率磁场
Molecular Dynamics Study on the Diffusion Properties of Hydrogen Atoms in Bulk Tungsten
2013年
Molecular dynamics simulations were performed to study the diffusion behavior of hydrogen atoms in body-centered cubic(bcc) tungsten(W). The energy distribution of a single hydrogen atom in the (001) plane of tungsten lattice was computed. The values of diffusion barriers agree well with other theoretical and experimental results. The interaction between an H atom and a vacancy was simulated, which shows effect on the diffusion behavior of hydrogen an H atom to diffuse in bulk W with and evidence of strong binding effect. The temperature atoms was investigated. The critical temperature for without vacancies were calculated to be 950 K and 450 K, respectively, which is supported by several experimental results. In addition, the diffusion coefficient of hydrogen atoms in tungsten was evaluated and analyzed.
余新刚苟富均
关键词:TUNGSTENHYDROGENDIFFUSION
Macroscopic damping model for structural dynamics with random polycrystalline configurations被引量:1
2018年
In this paper the macroscopic damping model for dynamical behavior of the structures with random polycrystalline configurations at micro-nano scales is established. First, the global motion equation of a crystal is decomposed into a set of motion equations with independent single degree of freedom (SDOF) along normal discrete modes, and then damping behavior is introduced into each SDOF motion. Through the interpolation of discrete modes, the continuous representation of damping effects for the crystal is obtained. Second, from energy conservation law the expression of the damping coefficient is derived, and the approximate formula of damping coefficient is given. Next, the continuous damping coefficient for polycrystalline cluster is expressed, the continuous dynamical equation with damping term is obtained, and then the concrete damping coefficients for a polycrystalline Cu sample are shown. Finally, by using statistical two-scale homogenization method, the macroscopic homogenized dynamical equation containing damping term for the structures with random polycrystalline configurations at micro-nano scales is set up.
Yantao YangJunzhi CuiYifan YuMeizhen Xiang
液态锡对低活化马氏体/铁素体钢CLF-1的腐蚀行为研究被引量:1
2020年
采用背散射电子扫描显微镜、电子衍射能谱和X射线衍射等分析方法,研究了浸泡在300~700℃的液态锡(Sn)中24h后的低活化马氏体/铁素体钢CLF-1的腐蚀行为。研究结果表明,在所有测试温度下液态锡对CLF-1钢表面均有不同程度的腐蚀,主要腐蚀机制为化合溶解腐蚀。铬(Cr)以单质形式溶解沉淀,液态锡与铁在CLF-1钢表面反应生成由铁锡化合物构成的腐蚀层。当温度低于500℃时,腐蚀层厚度近似为一常量,约8μm,化学成分为FeSn2。当温度高于500℃时,腐蚀层厚度随温度线性增加,腐蚀层呈双层结构,分别为CLF-1边界处的FeSn层和覆盖在其表面的FeSn2层。
贺平逆韦建军王志君张坤芶富均
关键词:聚变堆
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