摘要
Tungsten is one of best candidates for plasma facing materials(PFMs)in fusion reactors.But its application in fusion areas is strongly restricted by the inherent brittleness and high ductile-brittle transition temperature.To improve the toughness of W-based materials,W/TiN/Ta-laminated composites were fabricated by spark plasma sintering.Three-point bending test was performed to investigate the bending mechanical properties.Multiple crack propagation is the main crack propagation mode in W/TiN/Ta composites.Energy dissipation by interfacial debonding and crack deflection at interfaces as well as crack bridging by Ta foils and plastic deformation of Ta can contribute to the toughening of W/TiN/Ta composites.The existence of interfacial TiN coatings can act as weak points and promote interfacial debonding.TiN coatings with(111)preferred orientation are found to be conducive to the strengthening of W/TiN/Ta composites.
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2023年第5期1718-1723,共6页
稀有金属（英文版）
基金
financially supported by the National Magnetic Confinement Fusion Program(No.2013GB110005)
the Natural Science Foundation of China Program(No.51571095)。
