Materials development and evaluation for the ceramic helical expander

Technical Report · Thu Feb 01 04:00:00 EST 1979

OSTI ID:6161056

Landingham, R L; Taylor, R W

The supporting role of the materials program for the ceramic helical expander program is described. The materials problems for this rotory expander in an extremely severe environment-a direct coal-fired Brayton topping cycle is defined. Readily available materials and methods for possible solution to these material problems as well as initiating some longer-range studies to improve reliability were evaluated. A preliminary screening of materials in hot coal-fired environments to select candidate materials and coating was made. More detailed evaluations of these candidate materials-reaction-bonded silicon nitride (RBSN) and Si--Al--O--N (Sialon) system- and coatings-chemical-vapor-deposited silicon nitride (CVD-Si/sub 3/N/sub 4/) and CVD-Sialon need to be performed. Termination of the helical expander program abruptly stopped the materials program during this evaluation.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6161056
• Report Number(s): UCID-17899
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
ALLOYS
ALUMINIUM ALLOYS
BRAYTON CYCLE POWER SYSTEMS
CERAMICS
DATA
DATA FORMS
EVALUATION
EXPERIMENTAL DATA
FOSSIL-FUEL POWER PLANTS
GAS TURBINES
INFORMATION
MATERIALS
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
PNICTIDES
POWER PLANTS
RELIABILITY
SILICON ALLOYS
SILICON COMPOUNDS
SILICON NITRIDES
TABLES
THERMAL POWER PLANTS
TOPPING CYCLES
TURBINES
TURBOMACHINERY