Overview
Aluminum-Cerium 40 (AlCe40) is a specialized alloy combining aluminum with 40% cerium, a rare earth element. Developed to address high-temperature performance gaps in traditional aluminum alloys, it exhibits unique metallurgical properties. The addition of cerium forms stable intermetallic phases, enhancing thermal stability and mechanical strength. This alloy is increasingly adopted in industries requiring lightweight materials capable of withstanding extreme conditions, such as aerospace and energy. Its recyclability aligns with sustainable manufacturing trends, though cerium sourcing requires careful supply chain management due to geopolitical factors affecting rare earth availability.
Physical and Chemical Properties
AlCe40 maintains tensile strength up to 300°C, outperforming conventional aluminum alloys that weaken at elevated temperatures. Its oxidation resistance stems from cerium oxide layer formation, which acts as a protective barrier. The alloy’s thermal expansion coefficient is approximately 21–23 µm/m·°C, similar to cast iron, enabling compatibility in composite structures. Electrically conductive but less so than pure aluminum (≈30–35% IACS), it is non-magnetic and exhibits good fatigue resistance. Cerium content reduces hot cracking susceptibility during welding, though post-weld heat treatment may be necessary for critical applications.
Main Applications
In aerospace, AlCe40 is used for turbine blade shrouds and exhaust system components due to its 800°C short-term heat tolerance. Automotive applications include piston crowns and turbocharger housings, where it reduces weight versus steel while maintaining durability. The energy sector employs it in solar thermal receiver tubes and geothermal plant heat exchangers. Emerging uses include additive manufacturing (3D printing) of complex, heat-resistant geometries. Research continues for nuclear reactor cladding due to cerium’s neutron absorption properties.
Safety and Storage
Solid AlCe40 poses minimal hazard, but machining generates dust requiring NIOSH-approved respirators. Molten alloy handling demands full-face shields and aluminized gloves to prevent splash injuries. Storage should avoid chlorine-containing environments to prevent pitting corrosion. Spent alloy scraps must be segregated from magnesium-containing wastes to prevent hazardous reactions. Cerium extraction during recycling requires specialized smelting to prevent rare earth losses. MSDS sheets typically classify it as non-flammable but reactive with strong acids.
B2B Procurement Guide
Buyers should specify ASTM B928 or equivalent standards, with cerium content verified via spark spectroscopy. Preferred forms include ingots (for remelting) and pre-engineered billets (for CNC machining). Just-in-time procurement is advised due to cerium price volatility. Leading suppliers include major rare earth producers in China and specialty metallurgy firms in the EU/US. MOQs typically start at 500kg, with bulk discounts available. Consider FOB terms for international shipments due to alloy’s high density. Quality audits should check for cerium segregation in ingot cross-sections.
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