In {TAIL ~ one embodiment}, the facecoat region is formed from a slurry composition comprising {HEAD ~ an aluminum oxide}, a green chromium oxide and a silicon dioxide 
In { TAIL ~ one embodiment } , the facecoat region is formed from a slurry composition comprising { HEAD ~ an aluminum oxide } , a green chromium oxide and a silicon dioxide
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH