{
  "$type": "site.standard.document",
  "description": "A piston ring (1) is provided with a thermal spray coating (3) that contains tungsten carbide and chrome carbide as a hard phase, and contains nickel as a metallic binder phase, and is characterized in that the thermal spray coating (3) is formed by the spraying of a thermal spray powder that has…",
  "path": "/patents/970715",
  "publishedAt": "2014-09-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C22C29/08",
    "IHI CORP [JP]"
  ],
  "textContent": "A piston ring (1) is provided with a thermal spray coating (3) that contains tungsten carbide and chrome carbide as a hard phase, and contains nickel as a metallic binder phase, and is characterized in that the thermal spray coating (3) is formed by the spraying of a thermal spray powder that has been produced by means of a granulation sintering method, and that contains hard particles in which the mean particle diameter of the tungsten carbide has been adjusted by means of a BET method to fall within a range of not less than 0.15 µm and not more than 0.45 µm.",
  "title": "PISTON RING"
}