Duplexing sized high temperature resisting aluminium based composite material enhanced by granules of ceramics

Duplexing sized high temperature resisting aluminium based composite material enhanced by granules of ceramics

This invention relates to a double-size ceramic particle reinforced Al-based high temperature resistant composite. It has characteristics of comprising of carborundum particles, in-situ formed acerate dispersed Al4C3 particles and Al matrix. Dispersed Al4C3 particles possess a volume fraction of 3.7...

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1. Verfasser: ZONGYI,BI MA
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ALLOYS
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FERROUS OR NON-FERROUS ALLOYS
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TREATMENT OF ALLOYS OR NON-FERROUS METALS
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description This invention relates to a double-size ceramic particle reinforced Al-based high temperature resistant composite. It has characteristics of comprising of carborundum particles, in-situ formed acerate dispersed Al4C3 particles and Al matrix. Dispersed Al4C3 particles possess a volume fraction of 3.7~14.8% and are 0.01~0.05ª–m in diameter and 0.1~0.4ª–m in length while carborundum particles possess a volume fraction of 5~25% and are 3.5~15ª–m in size. For preparation aluminium and graphite powders are high-energy ball milled for 1~3 hours, thermal processed at 550~650 deg.C for 1~2 hours and then high-energy ball milled with carborundum powders for 0.5~2 hours. The mixed powders are cold compressed into billet with an 85~95% theoretical density and then molded by extrusion. The composite material has a high strength, modulus and excellent high-temperature performances and is thus applicable in the fields requiring certain high-temperature properties.
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It has characteristics of comprising of carborundum particles, in-situ formed acerate dispersed Al4C3 particles and Al matrix. Dispersed Al4C3 particles possess a volume fraction of 3.7~14.8% and are 0.01~0.05ª–m in diameter and 0.1~0.4ª–m in length while carborundum particles possess a volume fraction of 5~25% and are 3.5~15ª–m in size. For preparation aluminium and graphite powders are high-energy ball milled for 1~3 hours, thermal processed at 550~650 deg.C for 1~2 hours and then high-energy ball milled with carborundum powders for 0.5~2 hours. The mixed powders are cold compressed into billet with an 85~95% theoretical density and then molded by extrusion. 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subjects ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title Duplexing sized high temperature resisting aluminium based composite material enhanced by granules of ceramics
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