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