Loading patent…
AssigneeNgk Spark Plug Co., Ltd.
InventorsMabito Iguchi, Yuuki Hayasaka, Yasunobu Noritake
Estimating the term…
An yttrium oxyfluoride sprayed coating contains Y5O4F7 as a main component. In the yttrium oxyfluoride sprayed coating, when the total intensity of all peaks attributable to yttrium oxyfluoride in a diffraction spectrum obtained by X-ray diffractometry is assumed to be 100, the total intensity of all peaks attributable to yttrium fluoride and yttrium oxide is less than 10. Furthermore, in an yttrium oxyfluoride-containing sprayed coating, when the total intensity of all peaks attributable to yttrium oxyfluoride and yttrium fluoride in a diffraction spectrum obtained by X-ray diffractometry is assumed to be 100, the total intensity of all peaks attributable to yttrium oxide is less than 1.
A sprayed member comprising an yttrium oxide sprayed coating disposed directly on a metal substrate and an yttrium oxyfluoride sprayed coating disposed over the yttrium oxide sprayed coating, wherein, in the yttrium oxyfluoride sprayed coating, when a total intensity of all peaks attributable to yttrium oxyfluoride in a diffraction spectrum obtained by X-ray diffractometry is assumed to be 100, a total intensity of all peaks attributable to yttrium fluoride and yttrium oxide is less than 10,
Dependencies are inferred from the claim text.