科研之友
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摘要
Facing an extremely harsh service environment in the nuclear fusion devices, the intrinsic brittleness of tungsten materials has become the main factor restricting its application as the plasma facing materials. A structural toughening method of layered toughening belonged external toughening mechanism has been considered to be one of the most effective methods to improve the toughness of brittle materials. To protrude the necessity of layered toughening, the challenges and limitations of tungsten materials as plasma facing materials in nuclear fusion devices was introduced in this work. The provenience and characteristics of the layered toughening mechanism were also clarified. The toughening mechanisms of layered toughening include weak interface toughening, strong interface toughening and plastic intermediate layer toughening. Based on the mechanisms of layered toughening, the current research status and development trends of tungsten layered materials were summarized at the end.
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