Zobrazeno 1 - 10
of 27
pro vyhledávání: '"I.C. Grigorescu"'
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 27:261-266
Graded metal-carbide composites were produced by solid state transformations in Ni samples, which were coated with VC by thermally activated chemical vapor deposition (CVD) onto a Ni substrate, followed by heat treatments. CVD produced a multi layer
Publikováno v:
Surface and Coatings Technology. :308-311
The microstructure of VC laser clad coatings on AISI 1045 steel substrate has been investigated by X-ray diffraction (XRD), optical and scanning electron microscopy (SEM), X-ray energy dispersive (EDS) and X-ray photoelectron spectroscopy (XPS), resp
Publikováno v:
Surface and Coatings Technology. :437-440
Vanadil acetylacetonate (VO(C 5 H 7 O 2 ) 2 ) precursor was used for the chemical vapor deposition of vanadium oxicarbide coatings on substrates made of three grades of steels: AISI 304, AISI 316 and HCM9M. The coated samples were subjected to hardne
Publikováno v:
Surface and Coatings Technology. :441-445
Hard vanadium oxycarbide thin films were prepared by conventional atmospheric pressure chemical vapour deposition. As the precursor, vanadium(m) acetylacetonate was used, and low carbon steel and stainless steel were used as substrates. A reducing at
Publikováno v:
Surface and Coatings Technology. :604-608
Commercial Ni and 80%Ni20%Co coatings were brush-on electrodeposited on SAE 1045 steel substrate and other similar steel samples were hard chromium plated by immersion. In order to compare the tribological behaviour of these coatings, lubricated fric
Publikováno v:
Surface and Coatings Technology. :494-498
Ni-based alloys containing low amounts of boron and silicon, reinforced with hard carbides, are extensively used for wear-resistant coatings. A powdered alloy of NiBSi and two of NiCrBSi (with 10.5 and 15 wt.% Cr, respectively) were mixed with VC and
Publikováno v:
Surface and Coatings Technology. 45:263-272
Ni-Mo-Al coatings were deposited onto SAE 1045 steel samples using three commercial systems: one plasma deposition and two flame-spraying deposition. The samples were submitted to lubricated friction and wear tests using two devices: Falex LFW-1 oper
Autor:
G. Navas, I.C. Grigorescu
Publikováno v:
Surface and Coatings Technology. :132-134
The worn shaft of a turbine was restored by electrolytic brushing with Ni. Grinding performed after deposition produced partial flaking of the coating. A field analysis was required to identify the process stage where the failure was induced, i.e. su
Autor:
J. Lira Olivares, I.C. Grigorescu
Publikováno v:
Surface and Coatings Technology. 33:183-190
Four types of nichrome-WC sprayed coatings (85%, 55%, 15% and 5% WC) were studied by means of Falex dry friction and wear tests. Significant sudden drops in the friction force were recorded; from the morphological study of the worn surfaces it was de
Autor:
I.C. Grigorescu, J. Lira-Olivares
Publikováno v:
Wear. 120:383-385