scholarly journals ELECTRODEPOSITION OF CO-DOPED HYDROXYAPATITE COATING ON 316L STAINLESS STEEL

2018 ◽  
Vol 56 (1) ◽  
pp. 94 ◽  
Author(s):  
Vo Thi Hanh ◽  
Pham Thi Nam ◽  
Nguyen Thu Phuong ◽  
Dinh Thi Mai Thanh
Keyword(s):  
Stainless Steel ◽  
Adhesion Strength ◽  
Single Phase ◽  
316L Stainless Steel ◽  
Hydroxyapatite Coating ◽  
Stainless Steel 316L ◽  
Electrodeposition Method ◽  
Scanning Rate ◽  
Analytical Results ◽  
Co Doped

Hydroxyapatite (HAp) co-doped by magnesium (Mg), strontium (Sr), sodium (Na) and fluorine (F) were deposited on the 316L stainless steel (316L SS) substrate by electrodeposition method. The influences of scanning potential ranges, scanning times, scanning rates to form MgSrFNaHAp coating were investigated. The analytical results FTIR, SEM, Xray, EDX, thickness and adhension of the obtained coating at scanning potential ranges of 0 ÷ -1.7 V/SCE; scaning times of 5, scanning rate of 5 mV/s showed that MgSrFNaHAp coatings were single phase crystals of HAp, rod shape with the thickness 8.9 µm and the adhesion strength reached 8.38 MPa.

scholarly journals ELECTRODEPOSITION AND CHARACTERIZATION OF HYDROXYAPATITE/CARBON NANOTUBES (HAp/CNTs) NANOCOMPOSITE ON 316L STAINLESS STEEL

2018 ◽  
Vol 56 (3B) ◽  
pp. 50
Author(s):  
Nguyễn Thị Nguyễn Thị Thơm
Keyword(s):  
Carbon Nanotubes ◽  
Stainless Steel ◽  
Electrolyte Solution ◽  
316L Stainless Steel ◽  
Mechanical Test ◽  
Suitable Condition ◽  
Synthesis Temperature ◽  
Potential Range ◽  
Stainless Steel 316L ◽  
Scanning Rate

Hydroxyapatite/carbon nanotubes (HAp/CNTs) nanocomposite was successfully synthesized as a coating on 316L stainless steel (316L SS) by electrodeposition technique. The effects of scanning potential range, scanning rate, number of scans, and synthesis temperature were investigated. Fourier Transform Infrared Spectroscopy (FT-IR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and mechanical test were performed to characterise of the coatings. Suitable condition to synthesize HAp/CNTs/316L SS coatings is a scanning potential range from 0 to -1.65 V/SCE, a scanning rate of 5 mV/s, 5 scans, an electrolyte temperature of 45 oC and a CNTs concentration of 0.5 g/L in the electrolyte solution. At the condition, obtained nanocomposite coatings are composed of HAp and CNTs with the coating thickness is equal to 6.9 µm. The presence of 0.5 g/L of CNTs in the electrolyte solution, the solubility of obtained coatings is lower than that of pure HAp coating. In addition, the hardness of the HAp/CNTs coatings reaches 5.6 GPa, which was nearly 25 % higher than that of pure HAp.

Electrodeposition of Aluminum on 316L Stainless Steel from Molten Salts Based on Chlorides

2008 ◽  
Vol 373-374 ◽  
pp. 273-276 ◽  
Author(s):  
Yu Jiang Wang ◽  
Xin Xin Ma ◽  
Guang Wei Guo
Keyword(s):  
Stainless Steel ◽  
Cross Section ◽  
Molten Salts ◽  
Single Phase ◽  
316L Stainless Steel ◽  
Aluminum Layer ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Purity Aluminum ◽  
Scanning Electron

The electrodeposition of aluminum on 316L stainless steel from a molten salts based on chloride has been studied. The surface morphology of the aluminum layer has been examined through scanning electron microscope (SEM) and the structure of the aluminum layer has been analyzed by X-ray diffraction (XRD). The thickness of the deposited aluminum layer has been measured by the method of cross-section scan. It has been suggested that a white, smooth, non-porous and a high purity aluminum layer can be obtained on 316L stainless steel from the ternary chloride molten salts (AlCl3 – NaCl - KCl). And the structure of the aluminum layer was single-phase.

Mechanical and Electrochemical Characterization of Super-Solidus Sintered Austenitic Stainless Steel (316L)

2016 ◽  
Vol 35 (7) ◽  
pp. 643-651 ◽  
Author(s):  
A. Muthuchamy ◽  
A. Raja Annamalai ◽  
Rishabh Ranka
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Electrochemical Impedance ◽  
Electrochemical Behaviour ◽  
Compaction Pressure ◽  
Solidus Temperature ◽  
Stainless Steel 316L ◽  
Aisi 316L Stainless Steel ◽  
Strength And Ductility

AbstractThe present study compares the mechanical and electrochemical behaviour of austenitic (AISI 316L) stainless steel compacted at various pressures (200, 400 and 600 MPa) and conventionally sintered at super-solidus temperature of 1,400°C. The electrochemical behaviour was investigated in 0.1 N H2SO4 solution by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The shrinkage decreased and densification has been increased with increasing pressure. The mechanical and electrochemical behaviour with pressure has been correlated with densification response and microstructure (pore type, volume and morphology). Highest densification (~92% theoretical) achieved at 600 MPa (compaction pressure) and 1,400°C (sintering temperature) resulted in excellent combination of tensile strength and ductility (456 ± 40 MPa, 25 ± 1.1%), while showing excellent corrosion resistance (0.1 mmpy or 4.7 mpy).

Electrodeposition of sustainable fluoridated hydroxyapatite coatings on 316L stainless steel for application in bone implant

2016 ◽  
Vol 5 (5) ◽  
Author(s):  
Pham Thi Nam ◽  
Nguyen Thi Thom ◽  
Nguyen Thu Phuong ◽  
Vo Thi Hanh ◽  
Nguyen Thi Thu Trang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Bone Implant ◽  
Fluoridated Hydroxyapatite ◽  
Electrodeposition Method ◽  
Hydroxyapatite Coatings

AbstractFluoridated hydroxyapatite (FHAp) coatings were deposited on 316L stainless steel (316LSS) substrate by the electrodeposition method. Different concentrations of F

scholarly journals The Effects of Substrate Bias on the Properties of HfC Coatings Deposited by RF Magnetron Sputtering

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 963
Author(s):  
Di Pei ◽  
Li Wang ◽  
Ming-hui Ding ◽  
Zhao-nan Hu ◽  
Jun-yu Zhao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Bias Voltage ◽  
316L Stainless Steel ◽  
Steel Substrate ◽  
Rf Magnetron Sputtering ◽  
Substrate Bias ◽  
Stainless Steel 316L ◽  
Transmission Electron

In the paper, by using radio frequency (RF) magnetron sputter technology, the HfC coating grew on a 316L stainless steel substrate in an Ar atmosphere at various substrate bias voltages from 0 to −200 V. From the X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments, the HfC coatings were well crystallized and (111) preferential growth had been successfully obtained by controlling bias voltage at −200 V. Nanoindentation experimental results for the prepared HfC coatings indicated that they possessed the maximum nanohardness due to the formation of the (111) orientation. The results of electrochemical measurements displayed that 316L stainless steel (316L) coated with the HfC coatings had better corrosion resistance than bare 316L. With the bias voltage increasing to −200 V, adhesion of the 316L substrate with the HfC coating could be greatly improved, as well as corrosion resistance. The antithrombogenicity of the HfC coatings was identified by platelet adhesive and hemolytic ratio assay in vitro. It was shown that the hemocompatibility of coated 316L had been improved greatly compared with bare 316L and the HfC coatings possessed better antithrombogenicity with the bias voltage elevating above −150 V.

Tool wear morphology and life under various lubrication modes in turning stainless steel 316L

2020 ◽  
Vol 44 (3) ◽  
pp. 352-361 ◽  
Author(s):  
Nader Barari ◽  
Seyed Ali Niknam ◽  
Hedayeh Mehmanparast
Keyword(s):  
Stainless Steel ◽  
Tool Wear ◽  
Tool Life ◽  
Gas Turbines ◽  
316L Stainless Steel ◽  
Cutting Tools ◽  
Industrial Applications ◽  
Mechanical And Thermal Properties ◽  
Machining Performance ◽  
Stainless Steel 316L

One of the most important industrial demands is to improve the machinability of hard steels. Among hard steels, 316L stainless steel has significant mechanical and thermal properties recommended for many industrial applications and products, including aero-engines and gas turbines. Similar to many other hard-to-cut materials, the machining of 316L stainless steel requires an adequate selection of cutting parameters and lubrication modes. Limited studies have been found in this regard. In the present study, turning tests were conducted on 316L steel and the tool wear magnitude and morphology were assessed under four lubrication modes. Furthermore, to improve machining performance, a minimum quantity lubrication (MQL) system was used and the obtained results under this lubrication mode were compared to three other types of lubrication modes, including dry, wet, and MQCL. The composition of the adhered material on the cutting tools shows that in all lubrication modes, built-up edge (BUE) occurred. Furthermore, the use of high pressure-lubricated machining (MQCL) led to longer tool life as compared to the other three lubrication modes used. In fact, double the tool life was recorded for the cutting tools used under the MQCL mode.

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