Effect of transmutation elements Re and Ta on the vacancy formation and dissociation behaviors in W bulk

Transmutation elements are the essential products induced by high energy neutron radiation in plasma facing materials tungsten, which would bring the further effects on their point defects’ evolutions and service performance. Here, transmutation elements Re and Ta atom have been selected to assess the effects on vacancy and vacancy cluster in W material via first-principles calculations. The formation energy indicates mono-vacancy is more likely...