To manufacture a coating for an article for a semiconductor processing chamber, the article including a body of at least one of Al, Al2O3, or SiC, and a ceramic coating on the body. The ceramic coating includes a compound comprising Y2O3 in a range from about 50 mol % to about 75 mol %, ZrO2 in a range from about 10 mol % to about 30 mol %, and Al2O3 in a range from about 10 mol % to about 30 mol %, wherein the number of nodules per inch is in a range from about 30 nodules to about 45 nodules and the porosity is in a range from about 2.5% to about 3.2%.
