Patent Number: 
Section: claims

1. A material for a nuclear fusion reactor, the material consisting essentially of:an alloy including two or more substances selected from the group consisting of Be12M or Be13M, Be17M2 and Be;wherein M is a metal element selected from the group consisting of Ti, V, Mo, W, Zr, Nb and Ta; andwherein a composition ratio x of M to Be is in a range of 2.0≦x≦15.0 (at %). 2. The material for a nuclear fusion reactor according to claim 1,wherein a composition ratio x of M to Be is in a range of 7.7<x<10.5 (at %). 3. The material for the nuclear fusion reactor of claim 1, wherein the alloy is produced by casting; andwherein a crystal grain size of the alloy is no more than 50 μm. 4. The material for the nuclear fusion reactor of claim 1, wherein the alloy is produced by powder metallurgy; andwherein a crystal grain size of the alloy is no more than 50 μm. 5. A plasma facing material for a nuclear fusion reactor comprising the material for the nuclear fusion reactor of claim 1.