To provide a rotary disk apparatus for a centrifugal atomizer, capable of producing metal powder with good productivity in the centrifugal atomizer.SOLUTION: A rotary disk apparatus 10A for a centrifugal atomizer includes: a rotor 50 having a disk 80 fixed thereon; a driving unit 60 for rotatably driving the rotor 50; and a stator 40 for surrounding the rotor 50. Each of the rotor 50 and the stator 40 includes a plurality of rotor-side fin parts 52A and stator-side fin parts 42A, each arranged in multiple stages. The plurality of rotor-side fin parts 52A and stator-side fin parts 42A are arranged alternately via a gap. Each of the plurality of rotor-side fin parts 52A and stator-side fin parts 42A has, in a part where they face each other, a base material part and a cover layer for covering a surface of the base material part. The cover layer has emissivity higher than that of the base material part.SELECTED DRAWING: Figure 2
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