The liquidus surface in the Al2O3-ZrO2-Y2O3 phase diagram

Wear resistance of a plasma-electrospark zirconium diboride-based coating on aluminum alloy D16T

“…Note that lanthanum oxide has a high hydration capacity and probably exists as La(OH) 3 [5]. In view of Oxygen is revealed everywhere across the coating.…”

Phase diagram of the Al2O3–HfO2–Y2O3 system

“…2 The phase diagrams of the bounding binary systems have been examined in some detail. [3][4][5][6][7][8][9][10][11][12][13][14][15][16] The Al 2 O 3 -HfO 2 system is of the eutectic type with eutectic coordinates 33% 1 HfO 2 , 1890 • C and is described elsewhere. 3 The Al 2 O 3 -Y 2 O 3 system 4-10 includes three congruently melting at 1950, 1925 and 1980 • C compounds Y 3 Al 5 O 12 (Y 3 A 5 ), YAlO 3 (YA) and Y 4 Al 2 O 9 (Y 2 A) with corresponding eutectics:…”

The Al2O3–HfO2–Y2O3 phase diagram. III. Solidus surface and phase equilibria in crystallization of alloys

“…The coordinates of the tie-line triangle AL-F-Y 3 A 5 are determined by the composition of the AL, F, and Y 3 A 5 phases ( Table 2). The composition of the AL and Y 3 A 5 phases corresponds to the stoichiometry since these phases have no homogeneity ranges [3,4]. The isothermal field Y 3 A 5 + F + YA is located near the center of the concentration triangle Al 2 O 3 -HfO 2 -Y 2 O 3 and corresponds to invariant eutectic equilibrium L Y 3 A 5 + F + YA (E 3 , 1855°C) ( Fig.…”

“…The monovariant three-phase eutectic process L C + H (e 2 ) begins in the bounding binary system HfO 2 -Y 2 O 3 , continues along the bounding curve e 2 e 3 , changes into the monovariant metatectic process H C + L, through which the H-and C-Y 2 O 3 phases are transformed, and ends in the bounding binary system Al 2 O 3 -Y 2 O 3 at the point e 3 .…”