Al-O, Corundum, Phase transitions

• Al-O-Y-Zr
• Al-La-O-Zr
• Al-Nd-O-Zr
• Al-O-Sm-Zr
• Al-O-Si
• phase diagram
• fusion
• temperature for congruent melting
• structural transitions
• oxide
• corundum
• chalcogen
• quaternary
• transitional
• trigonal