Near-net-shape processing of metal-ceramic composites by reactive metal penetration

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb09005.x· OSTI ID:417759

Fahrenholtz, W G ^[1]; Ewsuk, K G; Ellerby, D T; Loehman, R E ^[2]

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1. Univ. of New Mexico, Albuquerque, NM (United States). Advanced Materials Lab.
2. Sandia National Labs., Albuquerque, NM (United States)

Metal-ceramic composites were made to near-net shape by reacting phase-pure mullite and mullite-glass preforms with molten Al using a reactive metal penetration process. Conversion of the two ceramic preforms to Al{sub 2}O{sub 3}/Al composites was accompanied by a 0.32% volume expansion and a 1.42% volume shrinkage, respectively. Molar volume and density calculations made assuming a net-shape reaction estimate {approximately}17 and {approximately}27 vol% Al to be present in the two composites after reaction. Results from quantitative stereology measurements used to quantify the concentration of metal in the reactively formed composites validate the calculations.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 417759
• Journal Information: Journal of the American Ceramic Society, Vol. 79, Issue 9; Other Information: PBD: Sep 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
MATERIALS WORKING
ALUMINIUM OXIDES
ALUMINIUM
SHAPE
MULLITE
GLASS
LIQUID METALS
IMPREGNATION
CHEMICAL REACTIONS
ARGON
OPTICAL MICROSCOPY
SCANNING ELECTRON MICROSCOPY