Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-27T01:41:30.589Z Has data issue: false hasContentIssue false
  • English
  • Français

Comparison of CVD and MOCVD-grown Al2O3 coatings in the performance of cemented carbide cutting tool inserts

Published online by Cambridge University Press:  11 March 2011

Piyush Jaiswal ,
Abdul Sathar ,
Arshiyan Shariff ,
Mohammed Saif ,
Sukanya Dhar  and
S. A. Shivashankar
Piyush Jaiswal
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India
Abdul Sathar
Affiliation:
Department of Mechanical Engineering, Reva Institute of Technology and Management, Bangalore 560 064, India
Arshiyan Shariff
Affiliation:
Department of Mechanical Engineering, Reva Institute of Technology and Management, Bangalore 560 064, India
Mohammed Saif
Affiliation:
Department of Mechanical Engineering, Reva Institute of Technology and Management, Bangalore 560 064, India
Sukanya Dhar
Affiliation:
Department of Mechanical Engineering, Reva Institute of Technology and Management, Bangalore 560 064, India
S. A. Shivashankar
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India
Get access

Abstract

Low-pressure MOCVD, with tris(2,4-pentanedionato)aluminum(III) as the precursor, was used in the present investigation to coat alumina on to cemented carbide cutting tools. To evaluate the MOCVD process, the efficiency in cutting operations of MOCVD-coated tools was compared with that of tools coated using the industry-standard CVD process.

Three multilayer cemented carbide cutting tool inserts, viz., TiN/TiC/WC, CVD-coated Al2O3 on TiN/TiC/WC, and MOCVD-coated Al2O3 on TiN/TiC/WC, were compared in the dry turning of mild steel. Turning tests were conducted for cutting speeds ranging from 14 to 47 m/min, for a depth of cut from 0.25 to 1 mm, at the constant feed rate of 0.2 mm/min. The axial, tangential, and radial forces were measured using a lathe tool dynamometer for different cutting parameters, and the machined work pieces were tested for surface roughness. The results indicate that, in most of the cases examined, the MOCVD-coated inserts produced a smoother surface finish, while requiring lower cutting forces, indicating that MOCVD produces the best-performing insert, followed by the CVD-coated one. The superior performance of MOCVD-alumina is attributed to the co-deposition of carbon with the oxide, due to the very nature of the precursor used, leading to enhanced mechanical properties for cutting applications in harsh environment.

Keywords

chemical vapor deposition (CVD) (deposition)coatingmachining
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1298: Symposium Q/R/T – Advanced Materials for Applications in Extreme Environments , 2011 , mrsf10-1298-t07-02
Copyright
Copyright © Materials Research Society 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Ciftci, Ibrahim, Tribology International, 39, 565 (2006).Google Scholar
2. Devi, A., Shivashankar, S.A. and Samuelson, A.G., J. Phys. IV France (Proceedings), 12, Pr 4–139 (2002).Google Scholar
3. Thamizhmani, S., Bin Omar, B., Saparudin, S., and Hasan, S., J. Achievements in Materials and Manufacturing Engineering, 26, 139 (2008).Google Scholar
4. Alabi, A.G.F., Ajiboye, T.K. and Olusegun, H.D., J. Engineering, Design and Technology, 8, 80 (2010).Google Scholar
5. Singh, M.P. and Shivashankar, S.A., Thin Solid Films, 161, 135 (2002).Google Scholar
6. Trent, E.M. in Metal Cutting (London, Butterworths Press, 1989)Google Scholar
7. Ezugwu, E.O., Kim, S.K., The performance of cermet cutting tools when machining an Ni–Cr–Mo (En 24) steel, Lubrication Engineering, 51(2), 139, (1995).Google Scholar