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