The substrate consists of a metal or {TAIL ~ an alloy} mainly composed of Ni or {HEAD ~ Al}, or stainless steel 
The substrate consists of a metal or { TAIL ~ an alloy } mainly composed of Ni or { HEAD ~ Al } , or stainless steel
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH