A method 1, in which heating the final mixture is to a temperature of 1550° 1700° C., after pressing thereof to {HEAD ~ a pressure} of {TAIL ~ at least 35 MPa}, to make a unitary artefact 
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A method 1 , in which heating the final mixture is to a temperature of 1550 ° 1700 ° C. , after pressing thereof to { HEAD ~ a pressure } of { TAIL ~ at least 35 MPa } , to make a unitary artefact
OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH