Boron and {HEAD ~ carbon} may be used as traditional sintering aids, with nitrogen to suppress grain growth, and additions of {TAIL ~ yttrium and lanthanide elements} to promote intergranular fracture 
Boron and { HEAD ~ carbon } may be used as traditional sintering aids , with nitrogen to suppress grain growth , and additions of { TAIL ~ yttrium and lanthanide elements } to promote intergranular fracture
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH