scholarly journals I depositi votivi di kotylai e kotyliskoi corinzi provenienti dal santuario demetriaco di Bitalemi a Gela

2019 ◽  
Author(s):  
Rosanna Padovano
Keyword(s):  
Composite Deposits

This paper concerns the study of the votive deposits, containing Corinthian kotylai and kotyliskoi, discovered in the Thesmophorion, situated on the Bitalemi hill at Gela (Sicily). The work, part of a broader analysis of these specific Corinthian classes, examines in depth the votive depositions made during the first phase of the sanctuary’s frequentation (5th layer). This report highlights six composite deposits that testify, through their material associations, some ritual features related to the Demeter Thesmophoros’ cult.

Co–P alloy matrix composite deposits reinforced by nano-MoS2 solid lubricant: An alternative tribological coating to hard chromium coatings

2021 ◽  
Vol 159 ◽  
pp. 106956
Author(s):  
Mehdad Fathi ◽  
Mir Saman Safavi ◽  
Soheil Mahdavi ◽  
Sahand Mirzazadeh ◽  
Vahid Charkhesht ◽  
...  
Keyword(s):  
Matrix Composite ◽  
Solid Lubricant ◽  
Alloy Matrix ◽  
Hard Chromium ◽  
Composite Deposits

The friction and wear of Ni–P–PTFE composite deposits under water lubrication

2003 ◽  
Vol 77 (3) ◽  
pp. 755-764 ◽  
Author(s):  
Ming Der Ger ◽  
K.H Hou ◽  
L.M Wang ◽  
Bing Joe Hwang
Keyword(s):  
Friction And Wear ◽  
Water Lubrication ◽  
Ptfe Composite ◽  
Composite Deposits

Surface durability of electroless Ni–P composite deposits

Wear ◽  
1999 ◽  
Vol 236 (1-2) ◽  
pp. 179-188 ◽  
Author(s):  
G Straffelini ◽  
D Colombo ◽  
A Molinari
Keyword(s):  
Surface Durability ◽  
Composite Deposits ◽  
Electroless Ni

Corrosion Behavior of Electrodeposited Nickel Coating Reinforced by Cr2O3 Particles

2021 ◽  
Vol 406 ◽  
pp. 203-218
Author(s):  
Saida Marmi ◽  
Shahnaz Siad ◽  
Abdelouahad Chala ◽  
Hayat Marmi
Keyword(s):  
Composite Coatings ◽  
Copper Substrate ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Electro Deposition ◽  
Corrosion Tests ◽  
Electrodeposited Nickel ◽  
Composite Deposits ◽  
High Degree ◽  
Deposited Films

The objective of this work is the characterisation of the composite deposits Ni-Cr2O3 on copper substrate; these deposits are obtained from bath of electro-deposition of Nickel watts. The different electrodeposited layers are characterized by various analytical techniques such as adhesion quality, corrosion tests, Vickers microhardness, morphology by scanning electron microscopy Followed by EDX microanalysis and X-ray diffraction. The corrosion tests are realized in a solution of 3.5 % NaCl using lost mass method, polarization and impedance spectroscopy techniques. It was found that the composite coatings Ni-Cr2O3 have an homogeneous and compact morphology, well crystallized and exhibit a high degree of codeposition of Cr2O3 particles incorporated in the nickel matrix. The co-deposited films have very good hardness, adhere perfectly to the substrate and are more resistant to corrosion.

Composite Deposits Developed by Welding on Horizontal Mill Hammers

2018 ◽  
Vol 1146 ◽  
pp. 27-31
Author(s):  
Emilia Florina Binchiciu ◽  
Traian Fleșer ◽  
Ionelia Voiculescu ◽  
Victor Geanta
Keyword(s):  
Centripetal Force ◽  
Low Alloy Steel ◽  
Mechanical Fatigue ◽  
Grinding Mills ◽  
Composite Layers ◽  
Present Solution ◽  
Combined Action ◽  
Composite Deposits ◽  
New Generation ◽  
Ground Load

The paper presents the concept of designing active hammer edges of horizontal mills for grinding tungsten carbide waste by making composite layers deposited by welding. The new generation of hammers is carried out on the principles of preventive and repetitive maintenance, by endowment with wear addition, predetermined as volume and geometric configuration, depending on the specific conditions of uninterrupted use for a period of time established for economic reasons. The main demands that affect the integrity of the active areas of grinding mills (high pressure abrasion wear, thermo-mechanical fatigue) generate both material losses and output from working rates, as well as excessive elongation of the support elements under the combined action of centripetal force and of the pressure exerted by the ground load. Under these conditions, the technically and economically optimized solution is to design the modular active elements in the form of easily assembled detachable components, made of a low alloy steel with average tear resistance (450-600MPa) on which we deposit by welding layers of composite austenitic steel, hardened by compression, so as to increase the lifetime of the hammers by up to 35% compared to the present solution, which can be upgraded up to 3 times for reuse.

scholarly journals Tailoring the morphology and electrocatalytic properties of electrochemically formed Ag/TiO2 composite deposits on titanium surfaces

2007 ◽  
Vol 72 (12) ◽  
pp. 1403-1418 ◽  
Author(s):  
S.V. Mentus ◽  
I. Boskovic ◽  
J.M. Pjescic ◽  
V. Grudic ◽  
Z. Bogdanov
Keyword(s):  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Electrode Polarization ◽  
Silver Deposition ◽  
Agno3 Solution ◽  
Composite Layers ◽  
Silver Electrodes ◽  
Titanium Surfaces ◽  
Composite Deposits ◽  
Polycrystalline Silver

Three different forms of Ag/TiO2 composite layers, which have whisker-, dot- and island-like distribution of silver were obtained on a mechanically polished titanium surface by adjusting the conditions of silver deposition from an aqueous AgNO3 solution. The deposit morphology was the result of both the program of electrode polarization and the template action of the simultaneously formed TiO2 layer. The catalytic activity of the composite layers toward the oxygen reduction reaction was studied in aqueous 0.1 M NaOH solutions and found to be a function of both the surface loading of silver and the type of silver distribution within the Ag/TiO2 composite layers. The reaction path of oxygen reduction on the composite layers was found to be always a 4e- one, characteristic otherwise of polycrystalline silver electrodes.

Carbon Nanotube Composite Deposits with High Hardness and High Wear Resistance

2003 ◽  
Vol 5 (7) ◽  
pp. 514-518 ◽  
Author(s):  
X. Chen ◽  
G. Zhang ◽  
C. Chen ◽  
L. Zhou ◽  
S. Li ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Carbon Nanotube ◽  
High Hardness ◽  
High Wear Resistance ◽  
Carbon Nanotube Composite ◽  
Composite Deposits
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