Mechanical properties of tantalum-tungsten interlayer between tungsten tile and thimble to prevent helium leak from He-cooled divertor
作者： Pingping Zhang , Weiping Shen , Yanan Zhou , Qingling Zhang
DOI: 10.1088/1742-6596/419/1/012025
关键词: Materials science 、 Fracture toughness 、 Divertor 、 Sintering 、 Flexural strength 、 Metallurgy 、 Vickers hardness test 、 Tantalum 、 Tungsten 、 Indentation
摘要: The tungsten parts made of pure tile and dispersion strengthened thimble with 3 mm interlayer tantalum-tungsten alloy are fabricated by Spark Plasmas Sintering (SPS). process SPS is that the temperature raised to 1700 °C at a rate 100 °C/min kept for min, under constant pressure 50MPa along Z-axis. mechanical properties different percent tantalum measured. results show increasing tantalum, hardness first increases then decreases; as indentation on sample closer tungsten, value Vickers much higher. highest when content 50% next tungsten. Bending strength drops 100% bending lowest. fracture toughness 25%, 9.89MPa•m1/2. toughening tungsten-tantalum between would better prevent helium leak from He-cooled divertor DEMO.
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