Disruption Erosion Tests on La₂O₃ Containing Tungsten Material

Disruption erosion tests on La₂O₃ containing and pure tungsten materials were performed by the electron beam irradiation facility. As a result, it was found that the disruption erosion of La₂O₃ – W evaluated from the weight loss was three times larger than that of pure – W. The surface observations suggest that the splashing of the melted layer during the electron beam irradiation occurs only for the La₂O₃ – W, which results in the larger weight loss in disruption erosion. This is considered to be due to the lower melting point of the added La₂O₃.