Patent ID: 8623527

Claim:
An article produced using a method wherein a solid solution ceramic coating is formed directly upon an exterior surface of a body of said article using a technique selected from the group consisting of thermal spraying, plasma spraying, sputtering, and chemical vapor deposition, wherein said body is formed from a material selected from the group consisting of aluminum, aluminum alloy, stainless steel, aluminum nitride, and quartz, and wherein said solid solution ceramic coating is formed from a combination of yttrium oxide and zirconium oxide, wherein a molar concentration of yttrium oxide ranges from about 90 mole % to about 70 mole %, and a molar concentration of zirconium oxide ranges from about 10 mole % to about 30 mole % , in a manner which produces a mean grain size of said solid solution ceramic coating which ranges from about 2 μm to about 8 μm, so that said coating on said article surface is resistant to erosion by halogen-containing plasmas used in semiconductor processing, and wherein a test specimen of a bulk solid solution ceramic material having a molar composition of said solid solution ceramic coating exhibits a flexural strength between about 120 MPa and about 140 MPa.