High temperature stability, interface bonding, and mechanical behavior in {beta}-NiAl and Ni{sub 3}Al matrix composites with reinforcements modified by ion beam enhanced deposition. Progress summary report, June 1, 1993--May 31, 1994

Technical Report · Thu Jan 21 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10150426· OSTI ID:10150426

Grummon, D S

Diffusion-bonded NiAl-Al{sub 2}O{sub 3} and Ni{sub 3}Al-Al{sub 2}O{sub 3} couples were thermally fatigued at 900 C for 1500 and 3500 cycles. The fiber-matrix interface weakened after 3500 cycles for the Saphikon fibers, while the Altex, PRD-166, and FP fibers showed little, if any, degradation. Diffusion bonding of fibers to Nb matrix is being studied. Coating the fibers slightly increases the tensile strength and has a rule-of-mixtures effect on elastic modulus. Push-out tests on Sumitomo and FP fibers in Ni aluminide matrices were repeated. Al{sub 2}O{sub 3} was evaporated directly from pure oxide rod onto acoustically levitated Si carbide particles, using a down-firing, rod-fed electron beam hearth; superior coatings were subsequently produced using concurrent irradiation with 200-eV argon ion-assist beam. The assist beam produced adherent films with reduced tensile stresses. In diffusion bonding in B-doped Ni{sub 3}Al matrices subjected to compressive bonding at 40 MPa at 1100 C for 1 hr, the diffusion barriers failed to prevent catastrophic particle- matrix reaction, probably because of inadequate film quality. AlN coatings are currently being experimented with, produced by both reactive evaporation and by N{sup +}-ion enhanced deposition. A 3-kW rod-fed electron-beam-heated evaporation source has been brought into operation.

• Research Organization: Michigan State Univ., East Lansing, MI (United States). Dept. of Metallurgy, Mechanics and Material Science
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-85ER45205
• OSTI ID: 10150426
• Report Number(s): DOE/ER/45205--8; ON: DE93013977
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070205
36 MATERIALS SCIENCE
360601
ALUMINIUM ALLOYS
ALUMINIUM NITRIDES
ALUMINIUM OXIDES
ARGON IONS
BORON ADDITIONS
COATINGS
COMPOSITE MATERIALS
DIFFUSION BARRIERS
FIBERS
INDUSTRIAL APPLICATIONS
RADIATION PROCESSING
ION BEAMS
MATRIX MATERIALS
NICKEL ALLOYS
NIOBIUM
PREPARATION AND MANUFACTURE
PROGRESS REPORT
REINFORCED MATERIALS