Tungsten (W) is one of best candidate metal for plasma-facing materials (PFM), especially due to its high melting temperature and neutron absorption capability. However, converting W into bulk PFM is hard because of its high melting point. This problem can be solved by adding metallic sintering aids with low melting points. In this study, W matrix with 1 wt% Ni aid was reinforced by adding NdB particles (1, 5, and 10 wt%). It can be introduced as a novel potential PFM, thanks to its low volatility and high neutron absorbability. The ceramic and composite powders produced via mechanochemical synthesis and mechanical alloying were examined in terms of composition, particle size, crystallite size, and lattice strain. Samples sintered via pressureless sintering (PS) and spark plasma sintering (SPS) were microstructurally analyzed by using an X-ray diffractometer (XRD), a scanning electron microscope (SEM) attached with an energy dispersive spectroscope (EDS), and mechanically analyzed in terms of microhardness and wear behavior. Based on the results, WB and WB phases emerged in the SPS'ed W1Ni-5NdB and PS'ed./SPS'ed W1Ni-10NdB composites. SPS'ed W1Ni-10NdB composite had the highest hardness value and the lowest specific wear rate. The SPS'ed W1Ni-5NdB composite showed fewer surface damages and higher irradiation resistance as compared with other samples after exposure of He irradiation.

中文翻译：

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一种新型面向等离子体的 NdB6 颗粒增强 W1Ni 基复合材料：粉末冶金制造、微观结构和机械表征


钨 (W) 是面向等离子体材料 (PFM) 的最佳候选金属之一，特别是由于其高熔化温度和中子吸收能力。然而，由于 W 的熔点较高，将 W 转化为块状 PFM 很困难。这个问题可以通过添加低熔点金属烧结助剂来解决。在本研究中，通过添加 NdB 颗粒（1、5 和 10 wt%）来增强含 1 wt% Ni 助剂的 W 基体。由于其低挥发性和高中子吸收能力，它可以作为一种新型的潜在 PFM 引入。通过机械化学合成和机械合金化生产的陶瓷和复合粉末的成分、粒径、微晶尺寸和晶格应变进行了检查。通过无压烧结 (PS) 和放电等离子烧结 (SPS) 烧结的样品，使用 X 射线衍射仪 (XRD)、扫描电子显微镜 (SEM) 和能量色散光谱仪 (EDS) 进行显微结构分析，并在显微硬度和磨损行为。根据结果​​，SPS'ed W1Ni-5NdB 和 PS'ed./SPS'ed W1Ni-10NdB 复合材料中出现了 WB 和 WB 相。 SPS 处理的 W1Ni-10NdB 复合材料具有最高的硬度值和最低的比磨损率。经过 He 辐照后，与其他样品相比，SPS 处理的 W1Ni-5NdB 复合材料表现出更少的表面损伤和更高的耐辐照性。