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Århammar, Cecilia
Publikasjoner (5 av 5) Visa alla publikasjoner
Chatzigeorgiou, E., Århammar, C., Gråsjö, J., Ekholm, V., Såthe, C., Olovsson, W., . . . Rubensson, J.-E. (2019). Soft X-ray Spectroscopy on  amorphous and crystalline magnesium carbonate. In: EUROMAT 2019: . Paper presented at EUROMAT 2019, 1-5 September 2019, Stockholm,. , Article ID 14135.
Åpne denne publikasjonen i ny fane eller vindu >>Soft X-ray Spectroscopy on  amorphous and crystalline magnesium carbonate
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2019 (engelsk)Inngår i: EUROMAT 2019, 2019, artikkel-id 14135Konferansepaper, Oral presentation with published abstract (Fagfellevurdert)
HSV kategori
Forskningsprogram
Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Identifikatorer
urn:nbn:se:uu:diva-395335 (URN)
Konferanse
EUROMAT 2019, 1-5 September 2019, Stockholm,
Tilgjengelig fra: 2019-10-17 Laget: 2019-10-17 Sist oppdatert: 2019-10-17
von Fieandt, L., M'Saoubi, R., Schwind, M., Kaplan, B., Århammar, C. & Jansson, B. (2018). Chemical Interactions Between Cemented Carbide and Difficult-to-Machine Materials by Diffusion Couple Method and Simulations. Journal of phase equilibria and diffusion, 39(4), 369-376
Åpne denne publikasjonen i ny fane eller vindu >>Chemical Interactions Between Cemented Carbide and Difficult-to-Machine Materials by Diffusion Couple Method and Simulations
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2018 (engelsk)Inngår i: Journal of phase equilibria and diffusion, ISSN 1547-7073, Vol. 39, nr 4, s. 369-376Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A simple and efficient diffusion couple method is utilized to study the chemical interactions between cemented carbide cutting tools and difficult-to-machine materials (Ti, Ti-6Al-4V, Ni, Inconel 718, Fe, and AISI 316L). The experimental results and simulations probe different chemical interactions between the cemented carbide and work materials. In particular, the formation of a thick TiC layer is observed at the cemented carbide/Ti and Ti-6Al-4V interface while eta-phase is formed at the interface between the cemented carbide and work materials Inconel 718, Fe and AISI 316L. Pure titanium and Ti-6Al-4V both interact strongly with the tool causing formation of TiC and dissolution of WC-grains. Experiments and diffusion simulations confirm bcc-W formation and progressive diffusion of W into bcc-Ti. For both Ti and Fe work materials a dense band of carbides (WC + eta or WC + TiC) forms at the interface, effectively inhibiting further diffusion. Ni does not form any stable carbide and lowers the eta-phase limit in terms of carbon content, wherefore diffusion can occur freely. The diffusion couple method used in this work, corroborated by DICTRA simulations should serve as a useful tool in the detailed analysis of worn tools where chemical wear is dominant.

sted, utgiver, år, opplag, sider
SPRINGER, 2018
Emneord
cemented carbide, DICTRA modeling, diffusion couples, machining
HSV kategori
Identifikatorer
urn:nbn:se:uu:diva-363060 (URN)10.1007/s11669-018-0639-y (DOI)000441127400002 ()
Tilgjengelig fra: 2018-10-18 Laget: 2018-10-18 Sist oppdatert: 2018-10-18bibliografisk kontrollert
Århammar, C., Grahn, A., Vall, M., Strömme, M. & Boman, M. (2016). Functionalization of amorphous magnesium carbonate by Atomic Layer Deposition of (3-Aminopropyl)trietoxysilane (APTES) and (3-aminopropyl)trimethoxysilane (APTMS). In: 43rd ICMCTF International conference on Coatings and Thin Films: . Paper presented at 43rd ICMCTF International conference on Coatings and Thin Films, April 25-29, 2016, San Diego, USA (pp. 8). , B2-2-8
Åpne denne publikasjonen i ny fane eller vindu >>Functionalization of amorphous magnesium carbonate by Atomic Layer Deposition of (3-Aminopropyl)trietoxysilane (APTES) and (3-aminopropyl)trimethoxysilane (APTMS)
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2016 (engelsk)Inngår i: 43rd ICMCTF International conference on Coatings and Thin Films, 2016, Vol. B2-2-8, s. 8-Konferansepaper, Oral presentation with published abstract (Fagfellevurdert)
HSV kategori
Forskningsprogram
Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Identifikatorer
urn:nbn:se:uu:diva-287967 (URN)
Eksternt samarbeid:
Konferanse
43rd ICMCTF International conference on Coatings and Thin Films, April 25-29, 2016, San Diego, USA
Tilgjengelig fra: 2016-04-27 Laget: 2016-04-27 Sist oppdatert: 2016-11-30
Blomqvist, A., Århammar, C., Pedersen, H., Silvearv, F., Norgren, S. & Ahuja, R. (2011). Understanding the catalytic effects of H(2)S on CVD-growth of alpha-alumina: Thermodynamic gas-phase simulations and density functional theory. Surface & Coatings Technology, 206(7), 1771-1779
Åpne denne publikasjonen i ny fane eller vindu >>Understanding the catalytic effects of H(2)S on CVD-growth of alpha-alumina: Thermodynamic gas-phase simulations and density functional theory
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2011 (engelsk)Inngår i: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 206, nr 7, s. 1771-1779Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The catalytic effect of H(2)S on the AlCl(3)/H(2)/CO(2)/HCl chemical vapor deposition (CVD) process has been investigated on an atomistic scale. We apply a combined approach with thermodynamic modeling and density functional theory and show that H(2)S acts as mediator for the oxygenation of the AI-surface which will in turn increase the growth rate of Al(2)O(3). Furthermore we suggest surface terminations for the three investigated surfaces. The oxygen surface is found to be hydrogenated, in agreement with a number of previous works. The aluminum surfaces are Cl-terminated in the studied CVD-process. Furthermore, we find that the AlClO molecule is a reactive transition state molecule which interacts strongly with the aluminum and oxygen surfaces.

Emneord
CVD, H(2)S, First principles, Thermodynamic modeling
HSV kategori
Identifikatorer
urn:nbn:se:uu:diva-168121 (URN)10.1016/j.surfcoat.2011.09.018 (DOI)000298711500040 ()
Tilgjengelig fra: 2012-02-07 Laget: 2012-02-06 Sist oppdatert: 2017-12-08bibliografisk kontrollert
Blomqvist, A., Århammar, C., Pedersen, H., Silvearv, F., Norgren, S. & Ahuja, R. (2011). Understanding the catalytic effects of H2S on CVD-growth of α-alumina: Thermodynamic gas-phase simulations and density functional theory. In: Proceedings of the 38th International Conference on Metallurgical Coatings and Thin Films (ICMCTF) — ICMCTF 2011. Paper presented at The 38th International Conference on Metallurgical Coatings and Thin Films (ICMCTF), May 2 to 6, 2011, San Diego, CA, USA (pp. 1771-1779).
Åpne denne publikasjonen i ny fane eller vindu >>Understanding the catalytic effects of H2S on CVD-growth of α-alumina: Thermodynamic gas-phase simulations and density functional theory
Vise andre…
2011 (engelsk)Inngår i: Proceedings of the 38th International Conference on Metallurgical Coatings and Thin Films (ICMCTF) — ICMCTF 2011, 2011, s. 1771-1779Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

The catalytic effect of H2S on the AlCl3/H2/CO2/HCl chemical vapor deposition (CVD) process has been investigated on an atomistic scale. We apply a combined approach with thermodynamic modeling and density functional theory and show that H2S acts as mediator for the oxygenation of the Al-surface which will in turn increase the growth rate of Al2O3. Furthermore we suggest surface terminations for the three investigated surfaces. The oxygen surface is found to be hydrogenated, in agreement with a number of previous works. The aluminum surfaces are Cl-terminated in the studied CVD-process. Furthermore, we find that the AlClO molecule is a reactive transition state molecule which interacts strongly with the aluminum and oxygen surfaces.

Serie
Surface and Coatings Technology ; 206:7
HSV kategori
Forskningsprogram
Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik
Identifikatorer
urn:nbn:se:uu:diva-160243 (URN)10.1016/j.surfcoat.2011.09.018 (DOI)
Konferanse
The 38th International Conference on Metallurgical Coatings and Thin Films (ICMCTF), May 2 to 6, 2011, San Diego, CA, USA
Tilgjengelig fra: 2011-10-18 Laget: 2011-10-18 Sist oppdatert: 2013-03-06bibliografisk kontrollert
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