Sliding component having wear-resistant coating

A sliding component including a wear-resistant coating comprising:

• a sliding component formed of a Ni alloy;
• and
• a wear-resistant coating provided on a sliding surface of the sliding component;
• wherein
• the wear-resistant coating includes an Al-containing Co alloy layer at least on a surface side of the wear-resistant coating, the Al-containing Co alloy layer containing Co whose percentage by mass is the largest therein as a main component, at least one of W, Ni, Mo, Fe, Si, and C, Cr, and 0.3% by mass or more and 26% by mass or less of Al,
• the wear-resistant coating further includes:
• a first oxide layer that is formed on a surface of the Al-containing Co alloy layer and includes an Al oxide and a Cr oxide;
• and
• a second oxide layer that is formed on a surface of the first oxide layer and includes an Al oxide and a Cr oxide,
• a percentage of the Al oxide by mass in the first oxide layer is larger than a percentage of the Al oxide by mass in the second oxide layer,
• a percentage of the Cr oxide by mass in the second oxide layer is larger than a percentage of the Cr oxide by mass in the first oxide layer, and
• the Al-containing Co alloy layer includes:
• a CoAl layer that is provided on the surface side of the wear-resistant coating and includes a CoAl phase;
• and
• an intermediate layer that is provided on a sliding component side of the CoAl layer, a percentage of Al by mass in the intermediate layer is smaller than a percentage of Al by mass in the CoAl layer,
• the Al oxide of each of the first and second oxide layers includes Al2O3, and
• the Cr oxide of each of the first and second oxide layers includes Cr2O3.