Computer-Based Methods for Thermodynamic Analysis of Materials Processing.

reportActive / Technical Report | Accession Number: ADA136085 | Open PDF

Abstract:

The data base previously developed for multicomponent Sialon Ceramic phase diagrams has been expanded to cover Ce203, BeO and Y203 additions. Isothermal sections in the MgO-Si3N4-SiO2, Y2O3-Si02-SiN4 and Ce203-Si02-Si3N4 system near 2000 K were computed and compared with limited experimental data. The trajectory of ordering temperatures for A2B2 and B2D03 reactions has been computed along the Fe3Si-Fe3A1 composition path in the BCC of the Fe-A1-Si system and compared with experiment. The two phase fcc bcc fields for ordered phases in the iron-aluminum-nickel, iron-aluminum-manganese, and the iron-nickel-manganese system between 700 C and 1200 C. Construction of a data base for fluoride systems consisting of systems containing ZrF4 which are employed tp synthesize fluoride glasses has been initiated and used to calculate the composition of maximum liquid stability in the ZrF4-LaF3-BaF2 and the ZrF4-BaF2-NaF systems where glass formation has been observed. The calculations have been extended to consider the effects of A1F3 additions on the glass compositions with good results. An analysis of the titanium-carbon-nitrogen system coupling the thermochemical and phase diagram data was performed to calculate the ternary phase diagram and thermochemical properties over a range of temperature.

Author(s):
Kaufman, L.
Author Organization(s):
MANLABS INC CAMBRIDGE MASS
Descriptive Note:
Final rept. 1 Oct 79-30 Sep 83,
Pagination:
0158

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFOSR-TR-83-1099
Contract/Grant Number(s):
F49620-80-C-0020
Task Number(s):
A2
Project Number(s):
2306
Monitor Series:
TR-83-1099
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_5.3.1_Analyze Problem; JCA_1_Force Support; JCA_1.2.5_Lessons Learned; JCA_1.2_Force Preparation; JCA_6.1_Information Transport; JCA_6_Net Centric; JCA_1.2.7_Experimentation; JCA_5.2.2_Develop Knowledge and Situational Awareness; JCA_5.2_Understand
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*Computer applications, *Thermodynamic properties, *Materials, *Processing, Thermochemistry, Synthesis(Chemistry), Data bases, Ceramic materials, Alloys, Phase diagrams, Chemical reactions
Field(s)/Group(s):
Physical Chemistry, Ceramics, Refractories and Glass, Fabrication Metallurgy
Keyword(s):
Sialon ceramics, PE61102F, WUAFOSR2306A2
Report Date:
1983 Nov 30