Interface and tensile behavior of squeeze cast AC8A-Al{sub 2}O{sub 3} composite

Journal Article · Sat Jan 15 00:00:00 EST 1994 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(94)90046-9· OSTI ID:231088

Baik, K H; Lee, G C; Ahn, S ^[1]

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1. Research Inst. of Industrial Science and Technology, Pohang (Korea, Republic of). Metallic Materials Div.

Squeeze casting is a processing technique to fabricate parts of low melting point alloys under high pressure of 30--150 MPa, which can be applied for the manufacture of metal matrix composite having low wettability between melt and reinforced fibers. The mechanical properties of the composite highly depend on the processing parameters such as infiltration pressure, preform temperature, and superheating of the melt. Microstructure and property of the interfacial region of fiber and matrix are known to play a major role in determining the mechanical properties of the metal matrix composite. For a composite material with high stiffness and high strength, the interfacial region should be strong enough to carry the load from matrix to fibers. In a theoretical viewpoint, the properties of the interfacial area can be described as a mechanics continuum and also a chemical discontinuum having neither solubility nor reaction between the matrix and the fibers. In a practical system, however, new phases are frequently observed at the interfacial region due to chemical interactions, which significantly affect the mechanical properties of the composite. In this research, the effect of reaction zone formed at the interface of matrix and alumina fibers in Al{sub 2}O{sub 3}-AC8A composite on the tensile strength and fracture behavior was studied. The preform temperature was chosen as a main variable of the squeeze casting process.

• OSTI ID: 231088
• Journal Information: Scripta Metallurgica et Materialia, Vol. 30, Issue 2; Other Information: PBD: 15 Jan 1994
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
INTERFACES
MICROSTRUCTURE
MECHANICAL PROPERTIES
ALUMINIUM OXIDES
ALUMINIUM BASE ALLOYS
SILICON ALLOYS
COPPER ALLOYS
MAGNESIUM ALLOYS
NICKEL ALLOYS
EXPERIMENTAL DATA
FRACTURE PROPERTIES