Influence of Crystal Structure on Friction Characteristics of Rare-Earth and Related Metals in Vacuum to 10−10mm of Mercury
- 1 January 1965
- journal article
- research article
- Published by Taylor & Francis in A S L E Transactions
- Vol. 8 (2), 123-132
- https://doi.org/10.1080/05698196508972086
Abstract
Friction, wear, and metal-transfer characteristics were determined for rare-earth and related metals in vacuum to 10−10 mm of mercury. The metals studied were lanthanum, neodymium, praseodymium, cerium, holmium, erbium, gadolinium, dysprosium, samarium, yttrium, and thallium. Friction and wear experiments were conducted with the rare-earth or related metals generally sliding against 440-C stainless steel. The results of the investigation indicate that crystal structure considerations and polymorphism can explain the friction, wear, and metal-transfer characteristics of the rare-earth and related metals in vacuum. Close-packed hexagonal crystal forms of the rare earths and thallium had much lower friction, wear, and metal-transfer characteristics than face-centered or body-centered cubic structures.Keywords
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