School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, People's Republic of China.
Sci Rep. 2016 Sep 6;6:32701. doi: 10.1038/srep32701.
Pure W and W-(2%, 5%, 10%) Lu alloys were manufactured via mechanical alloying for 20 h and a spark plasma sintering process at 1,873 K for 2 min. The effects of Lu doping on the microstructure and performance of W were investigated using various techniques. For irradiation performance analysis, thermal desorption spectroscopy (TDS) measurements were performed from room temperature to 1,000 K via infrared irradiation with a heating rate of 1 K/s after implantations of He(+) and D(+) ions. TDS measurements were conducted to investigate D retention behavior. Microhardness was dramatically enhanced, and the density initially increased and then decreased with Lu content. The D retention performance followed the same trend as the density. Second-phase particles identified as Lu2O3 particles were completely distributed over the W grain boundaries and generated an effective grain refinement. Transgranular and intergranular fracture modes were observed on the fracture surface of the sintered W-Lu samples, indicating some improvement of strength and toughness. The amount and distribution of Lu substantially affected the properties of W. Among the investigated alloy compositions, W-5%Lu exhibited the best overall performance.
采用机械合金化法在 20 h 内制备了纯 W 和 W-(2%、5%、10%)Lu 合金，并采用火花等离子烧结法在 1873 K 下烧结 2 min。采用各种技术研究了 Lu 掺杂对 W 的微观结构和性能的影响。为了进行辐照性能分析，在 He(+)和 D(+)离子注入后，以 1 K/s 的加热速率通过红外辐照，从室温到 1000 K 进行了热脱附光谱（TDS）测量。进行了 TDS 测量以研究 D 的保留行为。显微硬度显著提高，密度最初随 Lu 含量增加而增加，然后减少。D 保留性能与密度呈相同趋势。在烧结的 W-Lu 样品的断口上观察到穿晶和晶间断裂模式，表明强度和韧性有所提高。第二相颗粒被鉴定为 Lu2O3 颗粒，完全分布在 W 晶界上，产生了有效的晶粒细化。在研究的合金成分中，W-5%Lu 表现出最佳的整体性能。
