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Phase transformatio...
Phase transformation in kappa- and gamma-Al2O3 coatings on cutting tool inserts
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- Trinh, David (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Back, K (author)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
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- Pozina, Galia (author)
- Linköpings universitet,Halvledarmaterial,Tekniska högskolan
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- Blomqvist, H (author)
- Sandvik Tooling AB
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- Selinder, T (author)
- Sandvik Tooling AB
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- Collin, M (author)
- Sandvik Tooling AB
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- Reineck, I (author)
- Sandvik Tooling AB
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- Hultman, Lars (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Högberg, Hans (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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(creator_code:org_t)
- Elsevier BV, 2009
- 2009
- English.
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In: Surface & Coatings Technology. - : Elsevier BV. - 0257-8972 .- 1879-3347. ; 203:12, s. 1682-1688
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The phase transformation in as-deposited, metastable kappa- and gamma-alumina coatings on cutting inserts has been studied by a combination of X-ray diffraction, scanning electron microscopy and cathodoluminescence. In the case of kappa-alumina, mechanical forces during metal cutting lower the transformation temperature of the metastable phases to the thermodynamically stable alpha-alumina phase from 1050 degrees C to 930 degrees C. This is the reason why that coating has a similar performance during metal cutting when compared to the stable ce-alumina phase. The transformation temperature in gamma-alumina coated cutting tools is found to be as low as 950-975 degrees C. Cathodoluminescence (CL) has been demonstrated as a possible method for differentiation between the various alumina phases. Specifically, both kappa- and gamma-alumina films have revealed a strong room temperature CL with different peak energies depending on the phase. CL of the metastable alumina coatings annealed at the transformation temperatures corresponds to the stable alpha-alumina phase.
Keyword
- Alumina
- Phase transformation
- Coatings
- X-ray diffraction
- Cathodoluminescence
- NATURAL SCIENCES
- NATURVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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