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. 1968 Jan-Feb;72A(1):27–37. doi: 10.6028/jres.072A.004

Table 1. Experimental data for compositions in the Ln2O3-PdO systems.

System Composition Heat treatmenta X-ray diffraction analysesb Remarks
Temp. Time
mole % °C hr
Nd2O3-PdO 75:25 780 18 2:1 + Nd2O3 + 1:1 Nonequilibrium.
c 1000 18 2:1 + Nd2O3
c 1063 3 2:1 + Nd2O3
c 1103 2 2:1 + Nd2O3 Quenched in ice water.
d 1125 2 2:1 + Nd2O3
c 1130 62 2:1 + Nd2O3 Quenched in ice water.
d 1130 1.5 2:1 + Nd2O3
d 1135 1.5 2:1 + Nd2O3 + Pd Nonequilibrium.
d 1140 2 2:1 + Nd2O3 + Pd Nonequilibrium.
71:29 780 22 2:1 + Nd2O3 + 1:1 Nonequilibrium.
c 1000 78 2:1 + Nd2O3
66.6:33.3 780 18 2:1 + Nd2O3 + 1:1 Nonequilibrium.
790 18 2:1 + Nd2O3 + 1:1 Nonequilibrium.
800 20 2:1 + Nd2O3 + 1:1 Nonequilibrium.
900 71 2:1 + Nd2O3 Nonequilibrium. e
c 1000 18 2:1
c 1050 504 2:1
c 1070 2 2:1 Quenched in ice water.
c 1085 2 2:1
1115 20 2:1 + Nd2O3 + Pd Nonequilibrium; reheat of 1205 °C specimen.
d 1115 2 2:1
d 1125 2 2:1
d 1130 2 2:1
d 1135 2 2:1 + Pd + Nd2O3 Nonequilibrium.
1205 1 Nd2O3 + Pd
1300 1 Nd2O3 + Pd
62:38 780 18 2:1 + 1:1 + Nd2O3 Nonequilibrium.
845 20 2:1 + 1:1
c 1000 78 2:1 + 1:2
50:50 780 18 1:1 + Nd2O3 + PdO Nonequilibrium.
c 830 20 1:1 Quenched in ice water.
842 15 1:1 + Nd2O3 Nonequilibrium.e
845 144 2:1 + 1:2 Reheat of 902 °C specimen.
855 3 1:1
860 2 1:1 + 1:2 Nonequilibrium.
865 2 1:1 + 1:2 + 2:1 Nonequilibrium.
902 18 2:1 + 1:2
c 1000 18 2:1 + 1:2
c 1070 78 2:1 + 1:2 Quenched in ice water.
1080 2 2:1 + 1:2
1085 2 2:1 + 1:2 + Pd Nonequilibrium.
1090 2 2:1 + 1:2 + Pd Nonequilibrium.
1100 4 2:1 + Pd + 1:2 Nonequilibrium.
1200 18 Nd2O3 + Pd
1250 2 Nd2O3 + Pd
38:62 780 21 1:2 + 1:1 + PdO Nonequilibrium.
c 845 20 1:2+ 1:1 Quenched in ice water.
c 1000 78 1:2 + 2:1
33.3:66.6 780 18 1:2+ 1:1 + PdO Nonequilibrium.
c800 120 1:2
900 2 1:2
925 2 1:2
970 120 1:2 + Nd2O3 + Pd Nonequilibrium; reheat 1150 °C specimen.
975 2 1:2
c 1000 18 1:2 Quenched in ice water.
c 1000 48 1:2
1025 2 1:2
1040 2 1:2
c 1050 110 1:2
d 1060 2 1:2
d 1070 3 1:2
d 1080 2 1:2
d 1085 2 1:2 + Pd + 2:1 Nonequilibrium.
d 1090 1.5 1:2 + Pd + 2:1 Nonequilibrium.
1110 18 2:1 + Pd
1130 2 2:1 + Pd
1150 1 Nd2O3 + Pd
29:71 780 21 1:2 + 1:1 + PdO Nonequilibrium.
1000 3 1:2 + Pd
1020 1.5 1:2 + Pd
25:75 780 18 1:2 + 1:1 + PdO Nonequilibrium.
1000 3 1:2 + Pd
1050 1.5 1:2 + Pd
1075 2 1:2 + Pd
1085 3 Pd + 2:1 + 1:2 Nonequilibrium.
1110 2 Pd + 2:1
1150 2 Pd + Nd2O3
1300 1.5 Pd + Nd2O3
0:100 780 18 PdO
795 2 PdO
800 2 PdO + Pd Nonequilibrium.
810 4 Pd
825 1.5 Pd
850 3 Pd
900 3 Pd
1200 2 Pd
Sm2O3-PdO 75:25 780 18 2:1 + Sm2O3 + 1:1 Nonequilibrium.
c 1103 3 2:1 + Sm2O3 Quenched in ice water.
1140 1 2:1 + Sm2O3 + Pd Nonequilibrium.
66.6:33.3 780 19 2:1 + Sm2O3 + 1:1 Nonequilibrium.
790 120 2:1+ Sm2O3 + PdO Nonequilibrium; reheat 1200 °C specimen.
c 1000 20 2:1 + Sm2O3 Nonequilibrium.e
c 1000 24 2:1
d 1100 2.5 2:1
d 1110 2 2:1
d 1115 2 2:1 + Pd + Sm2O3 Nonequilibrium.
d 1125 1.5 2:1 + Pd + Sm2O3 Nonequilibrium.
1200 2 Sm2O3 + Pd
50:50 780 21 1:1 + 1:2+ Sm2O3 Nonequilibrium.
800 144 2:1 + 1:2 Reheat of 1000 °C specimen.
c 830 20 1:1 Quenched in ice water.
830 5 1:1
850 2 1:1 Reheat of 830 °C 20 hr specimen.
880 2.5 1:1 Reheat of 830 °C 20 hr specimen.
c 902 18 1:1 Quenched in ice water.
915 1.5 1:1 Reheat of 830 °C 20 hr specimen.
935 2 1:1 Reheat of 830 °C 20 hr specimen.
940 2 1:1 + 1:2 + 2:1 Nonequilibrium; reheat of 830 °C 20 hr specimen.
1000 20 2:1 + 1:2
1100 3 2:1 + Pd + 1:2 Nonequilibrium.
1200 2.5 Sm2O3 + Pd
33.3:66.6 780 21 1:2 + 1:1 + Sm2O3 Nonequilibrium.
790 120 1:2 + PdO + Sm2O3 Nonequilibrium; reheat of 1150 °C specimen.
c 800 54 1:2 Quenched in ice water.
c 1000 20 1:2
d 1055 2.5 1:2
d 1060 2 1:2 + Pd Nonequilibrium.
d 1075 2 1:2 + Pd + Sm2O3 Nonequilibrium.
1150 1 Sm2O3 + Pd
25:75 780 21 1:2 + PdO + Sm2O3 Nonequilibrium.
1050 1.5 1:2 + Pd Quenched in ice water.
La2O3-PdO 66.6:33.3 780 20 La2O3 + PdO + 1:2 Nonequilibrium.
c 1000 18 2:1 + La2O3 Nonequilibrium.e
c 1000 72 2:1 + La2O3 Nonequilibrium.e
c 1070 66 2:1 Ouenched in ice water
1150 2 2:1 Reheat of 1070 °C specimen.
1160 3 2:1 Reheat of 1070 °C specimen.
1185 2 2:1 Reheat of 1070 °C specimen.
1190 2 2:1 + La2O3 + Pd Nonequilibrium; reheat of 1070 °C specimen.
50:50 780 20 La2O3 + PdO + 1:2 Nonequilibrium.
850 144 2:1 + 1:2
c 1000 18 2:1 + 1:2
1000 144 2:1 + 1:2 + Pd Nonequilibrium; reheat of 1310 °C specimen.
1310 2 La2O3 + Pd + La(OH)3 La2O3 commonly hydrates at room temperature.
33.3:66.6 780 20 La2O3 + PdO + 1:2 Nonequilibrium.
c 1000 18 1:2 Quenched in ice water.
c 1070 66 1:2
d 1085 2 1:2
d 1090 2 1:2
d 1100 2.5 1:2
d 1105 2 1:2 + Pd Nonequilibrium.
d 1110 2 1:2 + Pd + 2:1 Nonequilibrium.
d 1140 2 2:1 + Pd Nonequilibrium.
Eu2O3-PdO 66.6:33.3 780 18 Eu2O3 + PdO + 1:1 + 2:1 Nonequilibrium.
c 900 10 2:1 + Eu2O3 Nonequilibrium.e
c 950 48 2:1 + Eu2O3 Nonequlibriume; quenched in ice water.
c 1050 36 2:1 + Eu2O3 Nonequilibrium.e
1085 2 2:1 + Eu2O3 + Pd Nonequilibriume; reheat of 1050 °C specimen.
1090 2 2:1 + Eu2O3 + Pd Nonequilibriume; reheat of 1050 °C specimen.
1095 2 2:1 + Eu2O3 + Pd Nonequilibriume; reheat of 1050 °C specimen.
50:50 780 18 Eu2O3 + 1:1 + PdO Nonequilibrium.
800 144 1:2 + 2:1 + Eu2O3 Nonequilibrium; reheat of 1000 °C 20 hr specimen.
c 850 67 1:1 + Eu2O3 Nonequilibrium.e
c 900 168 1:1 + Eu2O3 Nonequilibrium.e
960 2 1:1 + Eu2O3 Nonequilibriume; reheat of 900 °C specimen.
980 2 1:1 + Eu2O3 Nonequilibrium.e
985 2 1:1 + Eu2O3 + 1:2 Nonequilibrium.
990 2 1:1 + Eu2O3 + 1:2 Nonequilibrium.
1000 20 1:2 + 2:1 + Eu2O3 Nonequilibrium.
1000 144 1:2 + 2:1 + Eu2O3 Nonequilibrium; reheat of 1250 °C specimen.
1250 2 Eu2O3 + Pd
33.3:66.6 780 18 1:2 + PdO + Eu2O3 + 1:1 Nonequilibrium.
c 900 10 1:2 + Eu2O3 Nonequilibriume; quenched in ice water.
c 950 96 1:2
1040 2 1:2 Reheat of 950 °C specimen.
1045 2 1:2 + Pd + 2:1 Nonequilibrium; reheat of 950 °C specimen.
1050 2 1:2 + Pd + 2:1 Nonequilibrium; reheat of 950 °C specimen.
1055 2 1:2 + Pd + 2:1 Nonequilibrium; reheat of 950 °C specimen.
Gd2O3-PdO 66.6:33.3 780 18 Gd2O3 + 1:1 + PdO Nonequilibrium.
c 900 144 1:1 + Gd2O3
50:50 780 18 Gd2O3 + 1:1 + PdO Nonequilibrium.
c 900 20 1:1 + Gd2O3 Nonequilibrium.e
900 72 1:2 + Gd2O3 + Pd Nonequilibrium; reheat of 1100 °C specimen.
1000 2.5 1:1 + Gd2O3 Nonequilibriume; reheat of 900 °C 20 hr specimen.
1005 2 1:1 + Gd2O3 + 1:2 Nonequilibrium; reheat of 900 °C 20 hr specimen.
1010 3 1:1 + Gd2O3 + 1:2 Nonequilibrium; reheat of 900 °C 20 hr specimen.
1020 2 1:1 + Gd2O3 + 1:2 Nonequilibrium; reheat of 900 °C 20 hr specimen.
1040 2 Gd2O3 + Pd + 1:2 Nonequilibrium; reheat of 900 °C 20 hr specimen.
1100 3 Gd2O3 + Pd
33.3:66.6 780 18 1:1 + 1:2 + Gd2O3 Nonequilibrium.
c 900 144 1:2 + Gd2O3 Nonequilibrium.e
c 950 28 1:2 + 1:1 Nonequilibriume; quenched in ice water.
1015 2 1:2 + Gd2O3 Nonequilibriume; reheat of 950 °C specimen.
1020 2 1:2 + Gd2O3 Nonequilibriume; reheat of 950 °C specimen.
1025 2 1:2 + Gd2O3 + Pd Nonequilibrium; reheat of 950 °C specimen.
1030 2 1:2 + Gd2O3 + Pd Nonequilibrium; reheat of 950 °C specimen.
1035 2 1:2 + Gd2O3 + Pd Nonequilibrium; reheat of 950 °C specimen.
1040 2 1:2 + Pd + Gd2O3 Nonequilibrium; reheat of 950 °C specimen.
Dy2O3-pdO 66.6:33.3 780 18 1:1 + PdO + Dy2O3 Nonequilibrium.
850 67 1:1 + Dy2O3
c 900 18 1:1 + Dy2O3 Quenched in ice water.
c 1000 144 1:1 + Dy2O3
50:50 780 18 1:1 + Dy2O3 + PdO Nonequilibrium.
c 900 68 1:1 + Dy2O3 Nonequilibrium.e
790 120 Dy2O3 + PdO + Pd Nonequilibrium; reheat of 1250 °C specimen.
1000 144 Dy2O3 + Pd Reheat of 1250 °C specimen.
1010 2 1:1 + Dy2O3 Reheat of 900 °C specimen.
1025 2 1:1 + Dy2O3 Reheat of 900 °C specimen.
1030 2 1:1 + Dy2O3 + Pd Nonequilibrium; reheat of 900 °C specimen.
1250 2 Dy2O3 + Pd
33.3:66.6 780 18 1:1 + PdO + Dy2O3 Nonequilibrium.
c 900 20 1:1 + Pd
1050 120 Pd + Dy2O3
Ho2O3-pdO 50:50 780 18 Ho2O3 + PdO
c 790 20 Ho2O3 + PdO
800 2 Ho2O3 + PdO + Pd Nonequilibrium.
900 120 Ho2O3 + Pd
Y2O3-pdO 50:50 780 18 Y2O3 + PdO
c 790 20 Y2O3 + PdO
900 120 Y2O3 + Pd
1000 144 Y2O3 + Pd
Er2O3-PdO 50:50 780 18 Er2O3 + PdO
c 790 20 Er2O3 + PdO
900 120 Er2O3 + Pd
Tm2O3-PdO 50:50 780 18 Tm2O3 + PdO
c 790 18 Tm2O3 + PdO
900 120 Tm2O3 + Pd
1000 23 Tm2O3 + Pd
Yb2O3-PdO 50:50 780 18 Yb2O3 + PdO
c 790 18 Yb2O3 + PdO
900 120 Yb2O3 + Pd
Lu2O3-PdO 50:50 780 21 Lu2O3 + PdO
c 790 18 Lu2O3 + PdO
900 68 Lu2O3 + Pd
1000 25 Lu2O3 + Pd
a

All specimens were heat treated at 770 °C, a minimum of 18 hr. Unless otherwise indicated, fused silica tubes (sealed at one end) were used for specimen containers and were air quenched.

b

The phases identified are given in order of the relative amount present at room temperature.

c

Sealed platinum tubes were used for specimen containers.

d

Reheat of 1000 °C specimen.

e

PdO probably lost by volatilization.