The critical influence of carbon on the thermal stability of nanocrystalline Ni–W alloys. (February 2015)

• Record Type: Journal Article
• Authors: Marvel, Christopher J.; Cantwell, Patrick R.; Harmer, Martin P.
• Is Part Of: Scripta materialia. Volume 96(2015)
• Page Start: 45
• Page End: 48
• Publication Date: 2015-02
• Subjects: Nanocrystalline -- Alloy -- Ni–W -- Electroplated -- Sputtered; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.10.022
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The carbide Ni6 W6 C has been identified in electroplated and sputtered nanocrystalline Ni–23 at.% W annealed at 700 °C. This carbide is unexpected and forms due to carbon contamination, which is difficult to avoid in practice. Carbon has a low solubility in the Ni(W) solid solution and may segregate strongly to grain boundaries while W anti-segregation may occur during carbide precipitation. Carbon contamination may therefore impact the thermal stability of nanocrystalline Ni–W in ways not previously considered.