As with the refractory metal in the first coating, the metal, if present, may be in the form of particulate metal or {HEAD ~ atomically dispersed metal} or {TAIL ~ both} 
As with the refractory metal in the first coating , the metal , if present , may be in the form of particulate metal or { HEAD ~ atomically dispersed metal } or { TAIL ~ both }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL