A third constituent is 0.4% to 0.6% by {TAIL ~ weight} of a third mixture of {HEAD ~ substantially 88% Zr2 O3} and 12% Y2 O3 powder 
A third constituent is 0.4 % to 0.6 % by { TAIL ~ weight } of a third mixture of { HEAD ~ substantially 88 % Zr2 O3 } and 12 % Y2 O3 powder
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH