Thermodynamic analysis of chemical stability of ceramic materials in hydrogen-containing atmospheres at high temperatures. Final report

Technical Report · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6954565

Misra, A K

The chemical stability of several ceramic materials in hydrogen-containing environments was analyzed with thermodynamic considerations in mind. Equilibrium calculations were made as a function of temperature, moisture content, and total system pressure. The following ceramic materials were considered in this study: SiC, Si{sub 3}N{sub 4}, SiO{sub 2}, Al{sub 2}O{sub 3}, mullite, ZrO{sub 2}, Y{sub 2}O{sub 3}, CaO, MgO, BeO, TiB{sub 2}, TiC, HfC, and ZrC. On the basis of purely thermodynamic arguments, upper temperature limits are suggested for each material for long-term use in H{sub 2}-containing atmospheres.

• Research Organization: Sverdrup Technology, Inc., Cleveland, OH (USA)
• OSTI ID: 6954565
• Report Number(s): N-90-16072; NASA-CR--4271; E--4954; NAS--1.26:4271
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BERYLLIUM COMPOUNDS
BERYLLIUM OXIDES
BORIDES
BORON COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DOCUMENT TYPES
ELEMENTS
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
HIGH TEMPERATURE
HYDROGEN
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MINERALS
MOISTURE
MULLITE
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
PRESSURE EFFECTS
PROGRESS REPORT
REFRACTORY METAL COMPOUNDS
SILICA
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SILICON OXIDES
STABILITY
TEMPERATURE EFFECTS
THEORETICAL DATA
THERMODYNAMICS
TITANIUM BORIDES
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM CARBIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES