钨涂层及氧化镧合金面对等离子体材料研究

介绍了等离子体喷涂钨涂层和粉末冶金钨氧化镧合金面对等离子体材料的制备,并对其进行了性能分析,主要包括微观结构、杂质含量、气孔大小及气孔率分布、结合强度、热导率以及热负荷疲劳性能和承受能力。结果表明:真空等离子体喷涂钨涂层性能比大气喷涂钨涂层性能优越,是更为合适的钨涂层制备技术。真空喷涂钨涂层具有较低的气孔率、较高的热导率、较低的杂质含量和较优异的热负荷性能,能够承受10 MW/m²、100周次疲劳测试。氧化镧弥散掺杂相具有钉扎作用,能够抑制钨烧结过程中的长大,有效提高钨材料强度,改善热负荷性能,W-1%La₂O₃(质量分数)材料能够承受6MW/m²的热负荷。

Research of PS-W Coating and Lanthanum oxide Alloy as Plasma Facing Material

The paper introduced the fabricating technology of tungsten plasma facing material (W-PFM), such as plasma spraying technology and powder metallurgy with dispersed Lanthanum oxide (La₂O₃). And it was studied that the micro-structure and the main performances of tungsten materials as PFM. The results indicate that VPS-W coating has the better properties compared to APS-W coating: the lower porosity, the better thermal conductivity, the lower impurity content and the better heat flux performance. It can withstand 100 fatigue cycles under the heat flux of 10MW/m^₂ and is more appropriate for plasma facing material. La₂O₃ particles can hold back W particle growing and enhance the strength of tungsten, which are helpful to improve thermal performance of W PFM. And W-1wt.%La₂O₃ as PFM is suitable under the heat flux of no more 6MW/m^₂.