Aluminum alloys with rare metals
Supplier — AvecGlob Company — offers at an affordable price from the manufacturer alloys of aluminum with rare metals. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Alloys of aluminum with rare metals are most in demand for alloys with erbium, lanthanum, scandium, niobium and yttrium. The addition of these rare and rare-earth metals to aluminum increases the strength of the alloy and its ability to withstand alternating loads. In the same direction, the mischmetals, added to industrial-grade aluminum, also act.
The microstructure of aluminum alloys with these metals is modified, which improves properties such as electrical conductivity, optical quality and corrosion resistance.
The influence of rare earth elements in aluminum alloys is determined by their characters. Because of the large atomic radius and the desire to lose two outer s-electrons s and electrons 5d or 4f to become a trivalent ion, rare earth metals are very active in chemical reactions.
Forming as a degassing and disaggregating agent, they are able to react with gas, impurity and matrix in aluminum alloys. Rare-earth compounds with a stable chemical property and a high melting point are formed. As a strengthening phase, these compounds have the ability to change the structure and improve the properties of aluminum alloys.
Urgency of application
Aluminum alloys with rare metals can be used in aerospace engineering, as well as in the production of precision weapons — guidance systems for intercontinental missiles, satellites, long-distance communication systems.
|The basic substance in aluminum alloys with rare metals is aluminum (up to 90%), while the additions of rare and rare-earth metals usually do not exceed 4… 7%. As the accompanying elements, iron, silicon, magnesium and zinc are usually present. They are considered as impurities, with a total percentage of not more than 0.7… 1.0%. The chemical composition of such alloys is regulated by the requirements of ASTM B618.|
Physical and mechanical properties
- density, kg / m 3 — 2750… 2800;
- melting point, 0 С — 1040… 1150;
- coefficient of thermal expansion in the temperature range 20… 200 0 С, μm / deg — 20… 25;
- coefficient of thermal conductivity in the temperature range 20… 100 0 С, W / megade — 38… 50;
- hardness according to Brinell, НВ — 34… 50;
- Modulus of elasticity, GPa — 100… 108;
- limit of temporary resistance, MPa — 220… 330;
- yield strength, MPa — 190… 210;
- modulus of elasticity, GPa — 108… 114;
- permissible tensile elongation,% — 7… 10.
Assortment and application features
The range of rolling profiles and castings made of aluminum alloy with rare metals are supplied in accordance with the requirements of the customer.
Supplier — the company AvekGlob — offers to purchase aluminum alloys with rare metals. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.