Ni-Cr-Co Alloy Nanoparticles
|Ni-Cr-Co Alloy Nanoparticles|
|Product No||NRE- 2034|
|APS||<100nm (Can be Customized)|
|Molecular Weight||169.6227 g/mol|
Ni-Cr-Co Nanopowder / Nanoparticles
The most used oxidation-resistant structural materials for prolonged operation at temperatures above 1000 ~ are alloys based on Ni – Cr and Ni – Cr – Fe systems. Steels and alloys with high resistance to oxidation at temperatures up to 1250-1300 ~ are known today. The disadvantage of these materials is their low resistance to heat (resistance) at these temperatures. This is due to the instability of the hardening phases at high temperatures since the long-term strength of the alloy depends on the properties of the solid solution. At present, there is considerable interest in alloys based on cobalt or nickel-based alloys with a high concentration of cobalt. There are data in the literature on the oxidation of cobalt and its alloys, although there is little data on the effect of alloying elements on cobalt oxidation resistance. It has been reported that the addition of up to 40% of Ni slightly increases the oxidation resistance of cobalt. Up to 5% AI or up to 15% W has little effect on cobalt oxidation. Molybdenum and niobium decrease the resistance to oxidation of the alloy at 1200 ~ due to the formation of volatile oxides. The effect of chromium on cobalt oxidation resistance is similar to its effect on the oxidation resistance of nickel: the addition of 10% Cr significantly accelerates the oxidation of cobalt, which is due to the increase in the number of cationic defects and increase of cationic mobility in the scale with the addition of trivalent chromium ions. Cr 20-25% additions substantially increase the oxidation resistance of cobalt. Few Research has been conducted on ternary or more complex cobalt-based systems and the results are ambiguous. We carry out a systematic investigation into the oxidation resistance of Ni – Cr – Co and Ni – Cr – Co – Fe alloys in relation to the proportion of the alloy base elements with a constant concentration of Cr (20%).