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Synthesis of phosphorus-carbide thin films by magnetron sputtering
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0001-9402-1491
Research Institute for Technical Physics and Materials Science, P.O. Box 49, Budapest, Hungary.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska högskolan.
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2008 (Engelska)Ingår i: physica status solidi (RRL) - Rapid Research Letters, ISSN 1862-6254, Vol. 2, nr 4, s. 191-193Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Phosphorus-carbide, CPx (0.025≤x≤0.1) thin films have beensynthesized by magnetron sputtering from pressed graphite-phosphorustargets. The films were characterized by X-ray photoelectron spectroscopy,transmission electron microscopy and diffraction, andnanoindentation. CP0.02 exhibits C-P bonding in an amorphous structure with elements of curved grapheneplanes, yielding a material with unique short range order. These features are consistent with what has been predicted by our results of theoreticallymodeled synthetic growth of CPx. The films are mechanicallyresilient with hardness up to 24 GPa and elastic recovery upto 72%.

Ort, förlag, år, upplaga, sidor
Wiley InterScience , 2008. Vol. 2, nr 4, s. 191-193
Nyckelord [en]
Phosphorus-carbide (CPx), thin films, magnetron sputtering, resilient material
Nationell ämneskategori
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Identifikatorer
URN: urn:nbn:se:liu:diva-17114OAI: oai:DiVA.org:liu-17114DiVA, id: diva2:202001
Tillgänglig från: 2009-03-06 Skapad: 2009-03-06 Senast uppdaterad: 2016-08-31Bibliografiskt granskad
Ingår i avhandling
1. Fullerene-like CNx and CPx Thin Films; Synthesis, Modeling, and Applications
Öppna denna publikation i ny flik eller fönster >>Fullerene-like CNx and CPx Thin Films; Synthesis, Modeling, and Applications
2009 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

This Thesis concerns the development of fullerene-like (FL) carbon nitride (CNx) thin films and the discovery of phosphorus-carbide (CPx) compounds. The work dedicated to CPx include first-principles theoretical simulations of the growth and properties of FL-CPx structures. I have employed DC magnetron sputtering methods to synthesize both CNx and CPx thin films. The deposition conditions for CPx films were chosen on the basis of the theoretical results as well as from the experience from the deposition of FL-CNx thin films.

The characterization of the CPx films is divided into three main directions: structural characterization by transmission electron microscopyand scanning electron microscopy, analysis of the amount of elements and chemical bonds presentin the structure by X-ray photoelectron spectroscopy and Auger spectroscopy, and mechanicalproperty analysis by nanoindentation. The CPx films exhibit a short range orderedstructure with FL characteristics for substrate temperature of 300 °C and for a phosphorus content of 10-15 at.%, which isconsistent with the theoretical findings. These films also displayed the best mechanical properties in terms of hardness and resiliency, which are better than those of the corresponding FL-CNx films.

For the FL-CNx thin film material, I find that the surface water adsorption is lower compared to commercial computer hard disk top coatings. Following that line the dangling bonds in FL-CNx coatings have been investigated  by electron spin resonance (ESR). The absence of ESR signal for FL-CNx indicates very low density of dangling bonds in the material, which explains the low water adsorption tendency.

The potential for using highly elastic FL-CNx coatings in an automotive valve-train environment has also been investigated. CNx coatings of different nitrogen content were investigated using microscopy, wear testing, nanoindentation testing, and in an experimental cam-tappet testing rig. The FL-CNx coating with the higher value of hardness/elastic modulus showed greater durability in cam-tappet wear testing.

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2009. s. 60
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1247
Nyckelord
Phosphorus-carbide (CPx), carbon nitride (CNx), thin films, resilient coatings, magnetron sputtering, theoretical modeling
Nationell ämneskategori
Övrig annan teknik
Identifikatorer
urn:nbn:se:liu:diva-17126 (URN)978-91-7393-676-7 (ISBN)
Disputation
2009-03-30, Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 10:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2009-03-24 Skapad: 2009-03-06 Senast uppdaterad: 2020-02-19Bibliografiskt granskad

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Furlan, AndrejGueorguiev, Gueorgui KostovHögberg, HansBraun, SlawomirStafström, SvenHultman, Lars

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Furlan, AndrejGueorguiev, Gueorgui KostovHögberg, HansBraun, SlawomirStafström, SvenHultman, Lars
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TunnfilmsfysikTekniska högskolanYtors Fysik och KemiBeräkningsfysik
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