{HEAD ~ A protective coating system} includes a nickel aluminum zirconium alloy coating having beta phase nickel aluminum and {TAIL ~ at least one phase} selected from gamma phase nickel and the gamma prime phase nickel aluminum 
{ HEAD ~ A protective coating system } includes a nickel aluminum zirconium alloy coating having beta phase nickel aluminum and { TAIL ~ at least one phase } selected from gamma phase nickel and the gamma prime phase nickel aluminum
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