Pressure bonding molybdenum alloy (TZM) to reaction-bonded silicon nitride

Technical Report · Sat May 20 00:00:00 EDT 1978

DOI:https://doi.org/10.2172/6551215· OSTI ID:6551215

Huffsmith, S A; Landingham, R L

Topping cycles could boost the energy efficiencies of a variety of systems by using what is now waste heat. One such topping cycle uses a ceramic helical expander and would require that a reaction-bonded silicon nitride (RBSN) rotor be bonded to a shaft of TZM (Mo-0.5 wt % Ti-0.08 wt % Zr). Coupon studies show that TZM can be bonded to RBSN at 1300/sup 0/C and 69 MPa if there is an interlayer of MoSi/sub 2/. A layer of finely ground (10 ..mu..m) MoSi/sub 2/ facilitates bond formation and provides a thicker bond interface. The hardness and grain structure of the TZM and RBSN were not affected by the temperature and pressure required to bond the coupons.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6551215
• Report Number(s): UCID-17805; TRN: 79-000280
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
20 FOSSIL-FUELED POWER PLANTS
MOLYBDENUM BASE ALLOYS
BONDING
SILICON NITRIDES
WASTE HEAT UTILIZATION
TOPPING CYCLES
ALLOYS
FABRICATION
JOINING
MOLYBDENUM ALLOYS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON COMPOUNDS
WASTE PRODUCT UTILIZATION
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
200105 - Fossil-Fueled Power Plants- Heat Utilization