scholarly journals Effect of Diffusion Annealing Temperature on the Formation Process and Properties of a Carbon–Aluminum Composite Layer on Pure Titanium

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1994
Author(s):  
Hongzhan Li ◽  
Youping Ma ◽  
Zhengxian Li ◽  
Shouchang Ji ◽  
Yanfeng Wang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Composite Layer ◽  
Pure Titanium ◽  
Titanium Substrate ◽  
Annealing Treatment ◽  
Diffusion Annealing ◽  
X Ray Diffraction ◽  
Aluminum Composite ◽  
X Ray ◽  
Glow Plasma

A carbon–aluminum composite layer was prepared on the surface of pure titanium by double glow plasma carburizing, magnetron sputtering aluminizing, and vacuum-diffusional annealing treatment. The microstructure, phase composition, and properties of the composite layer obtained at different annealing temperatures were investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and the ball-on-disc wear method. Results showed that the layer contained a mixture of TiAl3, Ti2Al5, and TiC phases at 650 °C for 6 h, which can significantly enhance the hardness and wear resistance of pure titanium. The layer exhibited a higher hardness of around 1231 HV0.1, a lower friction coefficient of 0.33, and lower wear volumes of 0.018 mm3 than those of the titanium substrate.

Chemical Modification of Diamond Films on Pure Titanium Deposited by MPCVD Method

2005 ◽  
Vol 297-300 ◽  
pp. 1742-1750
Author(s):  
Cheolmun Yim ◽  
Do Hoon Shin ◽  
Yun Hae Kim ◽  
Yasunobu Moriguchi ◽  
Riichi Murakami
Keyword(s):  
Diamond Film ◽  
Photoelectron Spectroscopy ◽  
Pure Titanium ◽  
Titanium Substrate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Stretching Vibration ◽  
Infrared Spectrometer ◽  
Ft Ir ◽  
Oxidized Diamond

Diamond film was deposited on the pure titanium substrate by CH4-H2 gas mixture using MPCVD method. In order to carboxylate the surface of the diamond film, it was chemically treated in H2SO4:HNO3 (9:1, case 1) stirred at room temperature or in H2SO4:HNO3 (3:1, case 2) stirred at reflux. The oxidized diamond film was successively treated with 0.1M NaOH for 2hours and 0.1M HCl at 363K for 2hours, and then washed by distilled water. The surface of diamond film was observed by scanning electron microscopy (SEM). The diamond film was characterized using Raman spectroscopy and X-ray diffraction (XRD). Carboxylated diamond film was evaluated by Fourier transform infrared spectrometer (FT-IR), Mini secondary ion mass spectrometer (Mini SIMS) and X-ray photoelectron spectroscopy (XPS). In the FT-IR spectrum, the peak at 1640cm -1 was assigned with C=O stretching vibration of carboxylic acid. In the Mini SIMS profile, the peak intensities of mass number 16 (-O-) and 17 (-OH) were increased after the chemical treatment. The XPS results indicated COO- group and C=O group on the surface of diamond film.

Al Si Oxide Coating as Ttritium Penetration Barrier on 316L Stainless Steel Prepared by a Combined Process

2008 ◽  
Vol 59 ◽  
pp. 76-81
Author(s):  
Hong Bing Liu ◽  
Jie Tao ◽  
Jiang Xu ◽  
Zhao Feng Chen ◽  
Xian Jun Sun
Keyword(s):  
Photoelectron Spectroscopy ◽  
Hydrogen Permeability ◽  
Oxide Coating ◽  
Favorable Effect ◽  
X Ray Diffraction ◽  
Combined Process ◽  
X Ray ◽  
Transmission Electron ◽  
Outermost Surface ◽  
Glow Plasma

Based on the favorable effect of the elements Al and Si on the improvement in reducing hydrogen permeability, a new combined process of simultaneous aluminizing and siliconizing, followed by oxidizing treatments using double glow plasma technology on 316L substrate was developed in this work. Microstructure and phase structure of as- prepared coating was examined by scanning electronic microscopy (SEM), X-ray diffraction analysis (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), respectively. The results showed that the simultaneous aluminizing and siliconizing coating consisted of an outer aluminide layer (dissolved Si) and a diffusion zone. After a combined process, a continuous and compact Al2O3-rich coating was formed at the outermost surface. SiO2 was also detectable in the oxide coating.

Analysis of Optical Properties and Structure for CdS Films

2005 ◽  
Vol 475-479 ◽  
pp. 3721-3724
Author(s):  
W.L. Wang ◽  
K.J. Liao ◽  
Jian Zhang ◽  
P. Yu ◽  
G.B. Liu
Keyword(s):  
Optical Properties ◽  
Chemical Bath Deposition ◽  
Photoelectron Spectroscopy ◽  
Annealing Treatment ◽  
Oxide Content ◽  
Deposition Technique ◽  
X Ray Diffraction ◽  
Transparent Glass ◽  
X Ray ◽  
Cds Films

In this paper, the optical properties and structure of CdS films were investigated by SEM, X-ray diffraction, and x-ray photoelectron spectroscopy. The CdS films in this study were deposited on the plane transparent glass by chemical bath deposition technique. The experimental results have shown that the annealing treatment has an important effect on the optical properties and structure of CdS films. This may be ascribed to decreasing surface contaminations and oxide content in the films.

Defect-Related Photoluminescence from SiO2 Thin Films by Si-Ge Ions Doped

2011 ◽  
Vol 328-330 ◽  
pp. 1153-1156 ◽  
Author(s):  
Kun Zhong ◽  
Yan Dong Xia ◽  
Ju Hong Miao ◽  
Jiang Fu
Keyword(s):  
Thin Films ◽  
Photoelectron Spectroscopy ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
X Ray Diffraction ◽  
X Ray

Si and Ge ions are implanted into SiO2thin films, subsequently the annealing treatment are carried out. The samples exhibit photoluminescence (PL) peaks at 400, 470, 550 and 780 nm. With the annealing temperature increasing, the intensity of 400-470 nm PL band increases remarkably. After oxidation annealing treatment, the intensity of 400-470 nm PL band decreases, and that of 550 nm and 780 nm PL peaks rises. Combing with the results of X-ray photoelectron spectroscopy(XPS), X-ray diffraction (XRD) and PL measurement, we propose that the PL peaks at 400 nm, 470 nm, 550 nm and 780 nm originate from ≡Ge−Si≡ center, ≡Si−Si≡ center, SPR center and GeO center, respectively.

Stability and deactivation research of RuO2-PdO/Ti electrode in dye water degradation

2014 ◽  
Vol 70 (5) ◽  
pp. 757-762 ◽  
Author(s):  
Lin Du ◽  
Jin Wu ◽  
Guiying Li ◽  
Changwei Hu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Coating Layer ◽  
Titanium Substrate ◽  
Catalytic Degradation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Water Degradation ◽  
Scanning Electron

RuO2-PdO/Ti electrode was prepared and used for the electro-catalytic degradation of Active Red K-2BP. It was found that the electrode was very stable in the process. A discoloration rate of 96.2% could still be achieved on the electrode after being used for 100 runs. X-ray photoelectron spectroscopy, X-ray diffraction, and scanning electron microscopy characterizations of the electrode were carried out. Results showed that the deactivation of the electrode was caused by the reconstruction and oxidation of titanium substrate as well as by the coverage of the active phases on the surface of the electrode by silicon. The cracks on the coating layer also contributed to the deactivation.

Hydroxyapatite Coatings Produced by Right Angle Magnetron Sputtering for Biomedical Applications

2007 ◽  
Vol 1008 ◽  
Author(s):  
Zhendong Hong ◽  
Alexandre Mello ◽  
Tomohiko Yoshida ◽  
Lan Luan ◽  
Paula H. Stern ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Photoelectron Spectroscopy ◽  
Biomedical Applications ◽  
Titanium Substrate ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hydroxyapatite Coatings

AbstractHydroxyapatite coatings have been widely recognized for their biocompatibility and utility in promoting biointegration of implants in both osseous and soft tissue. Conventional sputtering techniques have shown some advantages over the commercially available plasma spraying method; however, the as-sputtered coatings are usually non-stoichiometric and amorphous which can cause some serious problems such as poor adhesion and excessive coating dissolution rate. A versatile right-angle radio frequency magnetron sputtering (RAMS) approach has been developed to deposit HA coatings on various substrates at low power levels. Using this alternative magnetron geometry, as-sputtered HA coatings are nearly stoichiometric, highly crystalline, and strongly bound to the substrate, as evidenced by analyses using x-ray diffraction (XRD), atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). In particular, coatings deposited on oriented substrates show a polycrystalline XRD pattern but with some strongly preferred orientations, indicating that HA crystallization is sensitive to the nature of the substrate. Post deposition heat treatment under high temperature does not result in a marked improvement in the degree of crystallinity of the coatings. To study the biocompatibility of these coatings, murine osteoblast cells were seeded onto various substrates. Cell density counts using fluorescence microscopy show that the best osteoblast proliferation is achieved on an HA RAMS-coated titanium substrate. These experiments demonstrate that RAMS is a promising coating technique for biomedical applications.

Bioactive Porous Film Produced on Titanium Substrate by Micro-Arc Oxidation

2008 ◽  
Vol 368-372 ◽  
pp. 1201-1202
Author(s):  
Q. Ma ◽  
Y.J. Wang ◽  
Cheng Yun Ning ◽  
Hai Mei Cheng ◽  
Zhao Yi Yin
Keyword(s):  
Pure Titanium ◽  
Titanium Substrate ◽  
Disodium Salt ◽  
Commercially Pure Titanium ◽  
X Ray Diffraction ◽  
Electrolytic Solution ◽  
Glycerol Phosphate ◽  
X Ray ◽  
Commercially Pure ◽  
Micro Arc Oxidation

Porous bioactive thin film on commercially pure titanium substrate was prepared by micro-arc oxidation (MAO) in electrolytic solution, which contained calcium acetate, β-glycerol phosphate disodium salt pentahydrate (β-GP) and lanthanum nitrate. The phases and microstructure of the bioactive films were examined by X-ray diffraction, scanning electron microscopy with energy dispersive X-ray spectrometer and electron probe microanalysis. The results showed that: (1) porous bioactive films with about 10μm were formed on titanium substrate by MAO; (2) phases of the thin films were hydroxyapatite, anatase and rutile; (3) elements of Ca, P, and Ti of films were identified by EDS.

Research on Different Heat Transfer Characteristics of the Dirt on the Pipe

2014 ◽  
Vol 644-650 ◽  
pp. 5179-5182
Author(s):  
Li Bai ◽  
Tan Liu
Keyword(s):  
Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
Copper Alloy ◽  
Pcr Amplification ◽  
X Ray Diffraction ◽  
Aluminum Composite ◽  
X Ray ◽  
Alloy Tube ◽  
Composite Pipe ◽  
Stainless Steel Pipe

In this study, the dirt adhered on the tubes of different materials (copper alloy tube, stainless steel pipe, polyethylene-aluminum composite pipe) were studied by the scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, PCR amplification, DGGE electrophoresis analyzers. Experimental results show that the microorganism in dirt on the copper alloy tube is mainly shuttle-type bacteria, and the distribution is dense. Stainless steel pipe’s dirt colony is assembling with long bacilli and cocci, polyethylene-aluminum composite pipe’s dirt is the large bacilli and density cocci. Three kinds of dirt in the pipe contains inorganic crystals with SiO2 and CaCO3, and the same type of element, but the content is differences, polyethylene-aluminum composite pipe have greater richness of microbial species, a copper alloy tube’s dirt is of little microorganisms.

Synthesis of Co3O4 Multilayer Nanosheet Material and its Promising Gas Sensing Property

2014 ◽  
Vol 937 ◽  
pp. 231-236 ◽  
Author(s):  
Ming Li Yin ◽  
Sheng Zhong Liu
Keyword(s):  
Photoelectron Spectroscopy ◽  
Gas Sensing ◽  
Annealing Treatment ◽  
Solution Concentration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sensing Material ◽  
Ethanol Resistance ◽  
Structure Morphology ◽  
P Type

Co3O4multilayer nanosheets were synthesized by a hydrothermal method and a post annealing treatment process. The effect of solution concentration and ratio on the morphology of Co3O4precursor was studied. The crystalline structure, morphology and elemental composition of Co3O4multilayer nanosheets were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy technologies. When exposed to reducing gas such as ethanol, resistance of Co3O4multilayer nanosheet sensor increases quickly, demonstrating that the Co3O4multilayer nanosheets are p-type conductivity. For 100 ppm alcohol at 240 °C, the sensor response is as high as 32, indicating that the powder of Co3O4multilayer nanosheets is a very promising low-powder gas sensing material.

Investigation of the Effect of Uv-Assisted Oxidation and Nitridation of Hafnium Metal Films

2003 ◽  
Vol 780 ◽  
Author(s):  
C. Essary ◽  
V. Craciun ◽  
J. M. Howard ◽  
R. K. Singh
Keyword(s):  
Uv Radiation ◽  
Photoelectron Spectroscopy ◽  
Grazing Angle ◽  
X Ray Diffraction ◽  
Metal Thin Films ◽  
X Ray ◽  
Force Microscopy ◽  
Si Substrates ◽  
Atomic Force ◽  
Silicon Interface

AbstractHf metal thin films were deposited on Si substrates using a pulsed laser deposition technique in vacuum and in ammonia ambients. The films were then oxidized at 400 °C in 300 Torr of O2. Half the samples were oxidized in the presence of ultraviolet (UV) radiation from a Hg lamp array. X-ray photoelectron spectroscopy, atomic force microscopy, and grazing angle X-ray diffraction were used to compare the crystallinity, roughness, and composition of the films. It has been found that UV radiation causes roughening of the films and also promotes crystallization at lower temperatures.Furthermore, increased silicon oxidation at the interface was noted with the UVirradiated samples and was shown to be in the form of a mixed layer using angle-resolved X-ray photoelectron spectroscopy. Incorporation of nitrogen into the film reduces the oxidation of the silicon interface.

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