Research and Development of Alloy Modified Tungsten-based Materials

Abstract

Development of controlled nuclear fusion energy is an effective solution to solve the problem of future energy. In recent years many experimental studies home and abroad find that pure tungsten has many advantages, such as high melting point, high heat conductivity, low physical sputtering rate, low tritium retention and low swelling, etc. Applied in extreme environments of nuclear fusion reactors, the material requires good overall properties such as oxidation resistance, mechanical properties, anti-irradiation properties, etc. However there are also some problems to be solved. For example, lower oxidation resistance, low recrystallization temperature, high ductile-brittle transition temperature and irradiation sensitivity. Therefore W-based materials' properties were improved via doping alloying elements or stable dispersed phases and fabricating ultra-fine grain tungsten, etc. Alloying is one of the most common methods to improve the performance of tungsten-based materials. This paper summarizes the research results in recent years. This review focuses on the change of properties and the correlative mechanism of alloyed tungsten-based materials and analyzes the development trend in future.