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Nanomechanical and ...
Nanomechanical and microtribological properties of yttrium thin films for photocathode engineering
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- Broitman, Esteban (författare)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska fakulteten,SKF Res and Dev Ctr, Netherlands
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- Lorusso, Antonella (författare)
- Univ Salento, Italy; Ist Nazl Fis Nucl, Italy
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- Perrone, Alessio (författare)
- Univ Salento, Italy; Ist Nazl Fis Nucl, Italy
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- Karoutsos, Vagelis (författare)
- Univ Patras, Greece
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- Vainos, Nikolaos A. (författare)
- Univ Patras, Greece
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- Gontad, Francisco (författare)
- Univ Salento, Italy; Ist Nazl Fis Nucl, Italy
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(creator_code:org_t)
- A V S AMER INST PHYSICS, 2019
- 2019
- Engelska.
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Ingår i: Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films. - : A V S AMER INST PHYSICS. - 0734-2101 .- 1520-8559. ; 37:3
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The authors study the nanomechanical and microtribological properties of yttrium (Y) thin films deposited by pulsed laser deposition on Cu polycrystalline substrates. Nanoindentation tests reveal that such films have a high hardness of H = 2.3 GPa and a reduced elastic modulus of 71.7 GPa with respect to the Cu substrates. The friction coefficient between a diamond tip and the Y film reaches a steady state value of mu similar to 0.34, lower than that for the Cu (mu similar to 0.38). Moreover, nano-scratch experiments show that Y films are more scratch-resistant than the Cu substrates, probably due to their greater hardness, higher elastic recovery, and lower friction coefficient. Their results confirm that the mechanical and tribological properties of the Y films are suitable for designing and fabricating scratch-resistant hybrid photocathodes and can reduce instabilities and unwanted discharges in the cavity of the radio-frequency gun. Furthermore, the low surface roughness and the low work function of the material are important characteristics for a photocathode based on the Y thin film for the production of high-brightness electron beams. Published by the AVS.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Tribologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Tribology (hsv//eng)
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- art (ämneskategori)
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