Zobrazeno 1 - 10
of 228
pro vyhledávání: '"T. R. Jervis"'
Publikováno v:
Surface and Coatings Technology. 89:158-164
We examined the effects of excimer laser surface processing and of laser alloying with titanium on the mechanical and tribological properties of A-7 tool steel. We found that laser processing and alloying had no discernible effect on the mechanical p
Publikováno v:
Materials Chemistry and Physics. 46:123-131
Different processing routes can be used to produce Fe-Ti-C surfaces for tribological purposes. In this paper we focus on the utilization of ion beam mixing, or ion beam mixing combined with ion implantation. It turns out that a microstructural evolut
Publikováno v:
Nanostructured Materials. 7:81-88
A systematic study of the synthesis-structure-mechanical properties relationship is reported for MoSi 2 N x films. MoSi 2 N x films with nitrogen content x ranging between 0 and 4.2 were prepared by sputtering technique. Cross-sectional transmission
Autor:
Terence E. Mitchell, Harriet Kung, T. R. Jervis, Michael Nastasi, Juha-Pekka Hirvonen, J.D. Embury
Publikováno v:
Kung, H, Jervis, T R, Hirvonen, J-P, Embury, J, Mitchell, T & Nastasi, M 1995, ' Structure and mechanical properties of MoSi2-SiC nanolayer composites ', Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, vol. 71, no. 4, pp. 759-779 . https://doi.org/10.1080/01418619508236219
A systematic study of the structure-mechanical properties relationship is reported for both single phase and nanolayer composites of MoSi2 and SiC. Single phase or alternating layers of MoSi2 and SiC were synthesized by d.c.-magnetron and r.f.-diode
Autor:
P. Torri, Reijo Lappalainen, Joseph R. Tesmer, Michael Nastasi, Hannu Kattelus, Harriet Kung, Ilkka Suni, Juha-Pekka Hirvonen, T. R. Jervis
Publikováno v:
Hirvonen, J-P, Suni, I, Kattelus, H, Lappalainen, R, Torri, P, Kung, H, Nastasi, M, Jervis, T & Tesmer, J 1995, ' Crystallization and oxidation behaviour of Mo-Si-N coatings ', Surface and Coatings Technology, vol. 74-75, no. Part 2, pp. 981-985 . https://doi.org/10.1016/0257-8972(95)08327-8
Mo-Si-N coatings with different nitrogen concentrations were produced by nitrogen alloying simultaneously during sputter deposition from a planar magnetron MoSi2 target with nitrogen plasma onto steel substrates. The ratio of molybdenum and silicon c
Publikováno v:
Journal of Materials Research. 9:1456-1467
Epitaxial TiN/V0.3Nb0.7N superlattices with a 1.7% lattice mismatch between the layers were grown by reactive magnetron sputtering on MgO(001) substrates. Superlattice structure, crystalline perfection, composition modulation amplitudes, and coherenc
Publikováno v:
Journal of Applied Physics. 75:4969-4974
Nanoindentation was used to study the mechanical properties of Ag/Ni multilayered thin films. Both the hardness and the elastic modulus of the multilayered thin films had values between those for homogeneous Ag and Ni thin films. The trend in the har
Publikováno v:
Jervis, T, Nastasi, M, Hubbard, K & Hirvonen, J-P 1993, ' Excimer laser surface processing of ceramics : Process and properties ', Journal of the American Ceramic Society, vol. 76, no. 2, pp. 350-355 . https://doi.org/10.1111/j.1151-2916.1993.tb03791.x
Surface modification of ceramics has proved to be of benefit in a number of applications. Excimer laser light provides a rapid and efficient means for surface alloying and modification of ceramic materials. The laser pulse can melt the surface of the
Publikováno v:
Hirvonen, J-P, Nastasi, M, Jervis, T & Zocco, T 1993, ' The effect of pre-and postimplantation of carbon on the phase formation and surface mechanical properties of an ion beam mixed Fe-Ti multilayered system ', Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, vol. 80-81, no. Part 1, pp. 398-403 . https://doi.org/10.1016/0168-583X(93)96148-6
The phase formation and its impact on the surface mechanical properties was studied in the Fe-Ti multilayered structures which were implanted with carbon either before or after ion beam mixing with Kr ions. Carbon implantation prior to the ion beam m
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 72:59-63
Samples of high purity annealed aluminum and 6061-T6 aluminum alloy were implanted with N+ ions at 200 keV at doses of 5, 10, 18, and 28 × 1017 cm−2. Additionally a third sample was implanted with 15 × 1017 cm−2 at 200 keV followed by an implan