Phase Equilibria Investigation of Binary, Ternary, and Higher Order Systems, Part V - The Phase Diagram W-B-C

Item

Title
Phase Equilibria Investigation of Binary, Ternary, and Higher Order Systems, Part V - The Phase Diagram W-B-C
Date
1970
Index Abstract
Not Available
Photo Quality
Complete
Report Number
AFML TR 69-117 Part 5
Corporate Author
Aerojet-General Corporation
Laboratory
Air Force Materials Laboratory
Extent
62
Identifier
AD0713154
Access Rights
This document has been approved for public release and sale; its distribution is unlimited
Distribution Classification
1
Contract
F33615-67-C-1513
DoD Project
7350
DoD Task
735001
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Date Modified
Scanned by request 9/6/2007 submitted by a Private Citizen (No Known Affiliation)
Abstract
The ternary alloy system W-B-C was investigated experimentally by means of X-ray, melting point, DTA, and metallographic techniques on hot pressed and heat treated, as well as melted specimens, and a phase diagram from 1500C through the melting range established. No ternary phases are formed in the system and the mutual solubilities between carbide and boride phases are small. The solid state sections (2000C) are characterized by two-phase equilibria existing between the phase pairs W2B + W2C, W2B + WC, WC + WB, WB + C, W2B5 + C, W2B5 + B4C, and WB approximately 4 + B4C. The two-phase equilibrium W2B + WC is replaced by an equilibrium W2C + WB above 2150C. Fifteen ternary isothermal reactions were found. Five are associated with pseudobinary eutectic equilibria, six with ternary eutectics, and the remaining four with class II ternary four-phase reaction isotherms.
Report Availability
Full text available
Date Issued
1970-08
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Creator
Rudy, E.
Media
AFMLTR69-117part05.pdf