What are cobalt based alloys?
Cobalt-Based alloys are materials whose cobalt-basis is alloyed with elements such as chromium, tungsten, nickel and iron. Along with nickel-based alloys, they are used in challenging environments including high temperatures and acids.
Where are cobalt alloys used?
Cobalt-chrome or cobalt-chromium (CoCr) is a metal alloy of cobalt and chromium. Cobalt-chrome has a very high specific strength and is commonly used in gas turbines, dental implants, and orthopedic implants.
What type of alloy is Inconel?
Inconels are a class of nickel-chrome-based super alloys characterized by high corrosion resistance, oxidation resistance, strength at high temperatures, and creep resistance. Inconel is able to withstand elevated temperatures and extremely corrosive environments due to two factors.
Is cobalt an alloy or pure metal?
Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth’s crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron….
| Cobalt | |
|---|---|
| Atomic number (Z) | 27 |
| Group | group 9 |
| Period | period 4 |
| Block | d-block |
Why cobalt is used in alloys?
Cobalt alloys have good magnetic properties, corrosion resistance, wear resistance, and high temperature strength. Relatively harder Co-alloys is used for resistance to wear. On the other hand the tougher Cobalt compositions are used for high-temperature applications such as gas-turbine vanes and buckets.
Is cobalt rare or common?
Cobalt is a rare element with a frequency in the Earth’s crust of 0,004 percent.
What is the history of cobalt alloys?
Cobalt (Co) alloys have been in use since 1907 when Elwood Haynes obtained the first patents on cobalt–chromium compositions. Historically, many of the commercial cobalt-base alloys are derived from the cobalt–chromium–tungsten and cobalt–chromium–molybdenum ternaries.
What are the properties of cobalt-based alloy?
Generally, cobalt-based alloys display favourable mechanical properties. They are corrosion, wear and heat resistant and are therefore used for components in challenging areas applications, such as hot gas turbines. Cobalt also displays great resistance against sulfides, preventing any sulfidation of the material.
What is cobalt used for?
The most common use of cobalt however is in metalworking as a strengthening alloy in steel and iron alloys. Generally, cobalt-based alloys display favourable mechanical properties. They are corrosion, wear and heat resistant and are therefore used for components in challenging areas applications, such as hot gas turbines.
Are cobalt alloys suitable materials for artificial articulation surfaces?
Cobalt alloys are suitable materials for artificial articulation surfaces due to their better wear resistance compared with titanium-based alloys. D. Klarstrom, A. Sharif, in Reference Module in Materials Science and Materials Engineering, 2017