SwePub
Sök i LIBRIS databas

  Extended search

WFRF:(Johansson Mats P. 1965 )
 

Search: WFRF:(Johansson Mats P. 1965 ) > Effects of nitrogen...

Effects of nitrogen vacancies on phase stability and mechanical properties of arc deposited (Ti0.52Al0.48)Ny (y<1) coatings

Schramm, Isabella C. (author)
Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten
Pauly, C. (author)
Functional Materials, Department Materials Science, Saarland University, Saarbrucken, Germany
Johansson Jõesaar, Mats P., 1965- (author)
Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten,SECO Tools AB, Fagersta, Sweden
show more...
Slawik, S. (author)
Functional Materials, Department Materials Science, Saarland University, Saarbrucken, Germany
Suarez, S. (author)
Functional Materials, Department Materials Science, Saarland University, Saarbrucken, Germany
Mücklich, F. (author)
Functional Materials, Department Materials Science, Saarland University, Saarbrucken, Germany
Odén, Magnus, 1965- (author)
Linköpings universitet,Nanostrukturerade material,Tekniska fakulteten
show less...
 (creator_code:org_t)
Elsevier, 2017
2017
English.
In: Surface & Coatings Technology. - : Elsevier. - 0257-8972 .- 1879-3347. ; 330:Supplement C, s. 77-86
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • Nitrogen sub-stoichiometric (Ti0.52Al0.48)Ny (0.92 ≥ y  ≥ 0.46) coatings were grown in a mixed Ar/N2 atmosphere by cathodic arc deposition on cemented carbide (WC/Co-based) substrates. The coatings present a columnar structure with decreasing column widths from 250 to 60nm, due to a corresponding reduced N content, accompanied by changes in preferred orientation from 200 to 111 to 220. Among these, coatings prepared with 0.92≥y≥0.75 exhibit spinodal decomposition and consequently age hardening at elevated temperatures. A reduced N content upshifts the hardness maximum by >300 °C. For these samples, the high temperature treatment resulted in interdiffusion of substrate elements, Co and C, mainly along column boundaries. Nevertheless, no detrimental effect in the hardness could be correlated. Conversely, a low N content sample (y=0.46) presents significant lattice diffusion of substrate elements Co, C, W, and Ta in the coating. In this case, the substrate elements are present throughout the coating, forming additional phases such as c-Ti(C,N), c-Co(Al,Ti,W), and c-(Ti,W,Ta)(C,N), with an observed increased hardness from 16 to 25GPa. We suggest that the substitution of nitrogen by carbon and the solution of W and Ta in c-TiN are responsible for the observed hardening. Our investigation shows the potential of sub-stoichiometric (Ti1-xAlx)Ny coatings for high temperature applications such as cutting tools and puts forth corresponding criteria for N content selection.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

TiAlN
Thin films
Nitrogen vacancies
Spinodal decomposition
Age hardening

Publication and Content Type

ref (subject category)
art (subject category)

Find in a library

To the university's database

Search outside SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view