Oxidation resistant alloy and manufacturing method of oxidation resistant alloy

A manufacturing method of oxidation resistant alloy, the method comprising:

• producing a first formed member by applying compression forming to metal powder;
• and
• applying compression forming to the first formed member in a state in which the first formed member is covered with alloy powder different from the metal powder,
• wherein applying the compression forming to the first formed member comprises entirely covering the first formed member with the alloy powder,
• wherein applying the compression forming to the first formed member comprises:
• producing a piece member through compression forming to the alloy powder;
• supporting the first formed member with the piece member by placing the piece member at at least some of corners of the first formed member or at a boundary between two flat or curved surfaces of the first formed member;
• and
• covering the first formed member with the piece member and an outer layer, the piece member and the outer layer being formed of the alloy powder, by covering the first formed member supported by the piece member with the alloy powder, and
• wherein oxidation resistance of a major constituent of the alloy powder is higher than oxidation resistance of a major constituent of the metal powder.