A process 14, wherein {TAIL ~ the sintering step} includes sintering in {HEAD ~ an N2 /H2 atmosphere} 
A process 14 , wherein { TAIL ~ the sintering step } includes sintering in { HEAD ~ an N2 /H2 atmosphere }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD