The thermosetting material contains a refractory metal capable of reacting with {HEAD ~ boron} to form {TAIL ~ a metal boride} 
to form
The thermosetting material contains a refractory metal capable of reacting with { HEAD ~ boron } to form { TAIL ~ a metal boride }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL