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