TABLE OF CONTENTS



ACKNOWLEDGEMENTS.................................... ii

ABSTRACT ....................................... .. vii

CHAPTER

 1 INTRODUCTION..................... ........1

 2 BACKGROUND ............ ....... .. ... ... ... 7

 2.1 Phase Diagrams ......................7

 2.1.1 Binary Phase Diagrams......... 7
 2.1.1.1 Ni-Mo................7
 2.1.1.2 Ni-Al............ 9
 2.1.1.3 Ni-W................. 9
 2.1.1.4 Ni-Ta...............12


2.1.2 Ternary
 2.1.2.1
 2.1.2.2
 2.1.2.3


Diagrams ............. 12
Ni-Al-Mo............12
Ni-Al-Ta............14
Ni-Al-W.............16


2.2 Binary Phases...................... 16


2.2.1 Ni-Mo...
 2.2.1.1
 2.2.1.2
 2.2.1.3
 2.2.1.4

2.2.2 Ni-W....
 2.2.2.1
 2.2.2.2
 2.2.2.3
 2.2.2.4


................... 16
Ni4Mo............... 18
Ni3Mo...............20
Ni2Mo...... ........ 20
Ni-Mo. ..............23

..................... 23
Ni4W ...............24
Ni3W .................24
Ni2W ................24
NiW ................. 24


2.2.3 Domain Variants/Antiphase
 Boundaries..................25
 2.2.3.1 Ni4x(Dla)...........25
 2.2.3.2 Ni3x(D022). .....27
 2.2.3.3 Ni2x(Pt2Mo).........29

2.2.4 SRO in Ni-x Binaries.........29