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Study progression in application of process analytical technologies on film coating
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作者 Tingting Peng Ying Huang +4 位作者 Liling Mei Linna Wu Longkai Chen Xin Pan Chuanbin Wu 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2015年第3期176-185,共10页
Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopt... Film coating is an important unit operation to produce solid dosage forms,thereby,the monitoring of this process is helpful to find problems in time and improve the quality of coated products.Traditional methods adopted to monitor this process include measurement of coating weight gain,performance of disintegration and dissolution test,etc.However,not only do these methods cause destruction to the samples,but also consume time and energy.There have recently emerged the applications of process analytical technologies(PAT)on film coating,especially some novel spectroscopic and imaging technologies,which have the potential to real-time track the progress in film coating and optimize production efficiency.This article gives an overview on the application of such technologies for film coating,with the goal to provide a reference for the further researches. 展开更多
关键词 film coating Process analytical technologies (PAT) Spectroscopic techniques Imaging techniques
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Preparation and Characterization of Alumina Membranes on Capillary Supports: Effect of Film-coating on Crack-free Membrane Preparation 被引量:2
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作者 朱瑾 范益群 徐南平 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第3期377-383,共7页
Ceramic capillary membrane has received much attention due to its relatively high pack density and favorable mechanical strength.However,it is difficult to prepare capillary membrane on its thin support by a dip-coati... Ceramic capillary membrane has received much attention due to its relatively high pack density and favorable mechanical strength.However,it is difficult to prepare capillary membrane on its thin support by a dip-coating method.In this study,alumina microfiltration membranes were prepared on the inner surface of alumina capillary support(outer diameter 4 mm,inner diameter 2.5 mm)by a dip-coating method.Scanning electron microscopy(SEM)observation,gas bubble pressure(GBP)method and membrane permeation test were carried out to evaluate membrane performance.Two major effects in preparation of crack-free membrane,capillary filtration and film-coating,upon the thin support were studied.The as-prepared crack-free membrane presents a narrow pore size distribution,a mean pore size of about 0.6μm and a high pure water flux of 86000 L·m -2 ·h -1 ·MPa.It is proved that the membrane thickness should be sufficiently large to overcome the defects of support surface,but it is only one of the prerequisites for the formation of crack-free membrane.Furthermore,it is demonstrated that the capillary filtration effect is greatly restricted for thin capillary support with the dip-coating method and the film-coating effect plays a crucial role in the formation of crack-free membrane. 展开更多
关键词 CAPILLARY film coating DIP-coating ceramic membrane
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Carbon Film Coating Used in CdZnTe Crystal Growth
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作者 侯清润 高炬 +1 位作者 王金义 陈纪安 《Rare Metals》 SCIE EI CAS CSCD 1997年第2期35-37,共3页
A simple method of carbon film coating used in CdZnTe crystal growth was developed. The optimum parameters were selected. Breakdown of carbon film was commonly seen if Cd reservoir was not used in the crystal growth. ... A simple method of carbon film coating used in CdZnTe crystal growth was developed. The optimum parameters were selected. Breakdown of carbon film was commonly seen if Cd reservoir was not used in the crystal growth. The carbon film was in good condition when the vapor pressure of Cd was kept around 0.1 MPa during crystal growth. 展开更多
关键词 Carbon film coating CDZNTE Crystal growth
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Improving the high frequency response of a loudspeaker using hydrogen-free diamond-like carbon film coating at low temperature 被引量:2
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作者 LIN ChiiRuey LIU ShinHwa +1 位作者 LIOU WangJeng CHANG ChienKuo 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第3期385-391,共7页
Hydrogen-free diamond-like carbon (DLC) thin films were deposited at low temperature (less than 100~C) by an RF magne- tron sputtering facility. DLC films have the ability to change the sound velocity (E/p) in l... Hydrogen-free diamond-like carbon (DLC) thin films were deposited at low temperature (less than 100~C) by an RF magne- tron sputtering facility. DLC films have the ability to change the sound velocity (E/p) in loudspeakers for applications of hard coating. The hydrogen-free DLC films were coated onto PEI diaphragm substrates. The ID/IG ratio and the surface roughness are 2.09 and less than 0.86 nm (Ra) with a scanning area of 50 um x 50 um, respectively. Frequency response analysis of the DLC films on the diaphragm shows that the high frequency response increases by 0.2 dB-5.1 dB (6 kHz-ll.2 kHz), -0.4 dB-1.8 dB (11.8 kHz-20 kHz) on average. On the basis of the results of this study, we validated that it was feasible to sputter hydrogen-free DLC films on polymer substrates for mass production. These results also provided useful parameters for future applications of electro-acoustic devices. 展开更多
关键词 DLC thin films coating DIAPHRAGM frequency response physical vapor deposition
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Biopolymer Films and Coatings in Packaging Applications--A Review of Recent Developments 被引量:5
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作者 Jari Vartiainen Mika Vaha-Nissi Ali Harlin 《Materials Sciences and Applications》 2014年第10期708-718,共11页
This review covers the recent developments in the field of biobased packaging materials. Special emphasis is placed on the barrier properties, which are crucial in terms of food packaging. The state-of-the-art of seve... This review covers the recent developments in the field of biobased packaging materials. Special emphasis is placed on the barrier properties, which are crucial in terms of food packaging. The state-of-the-art of several biopolymers including pectin, starch, chitosan, xylan, galactoglucomannan, lignin and cellulose nanofibrils is discussed. As in most cases the packaging related properties of single layer biopolymer films are inadequate, the thin film coatings, such as sol-gel and ALD (atomic layer deposition), as well as the multilayer coatings are also briefly touched. 展开更多
关键词 Biopolymers PACKAGING films and coatings Barrier Properties
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Effect of konjac glucomannan and chitosan-based film coatings on the quality of fresh sea bass(Lateolabrax maculatus)under refrigerated condition 被引量:1
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作者 Miao Chen Maninder Meenu Baojun Xu 《Journal of Future Foods》 2021年第2期187-195,共9页
Sea bass(Lateolabrax maculatus)is one of the important seafood in China.Its shelf-life under refrigerated storage exponentially deteriorate due to the growth of spoilage microorganisms,protein degradation and lipid ox... Sea bass(Lateolabrax maculatus)is one of the important seafood in China.Its shelf-life under refrigerated storage exponentially deteriorate due to the growth of spoilage microorganisms,protein degradation and lipid oxidation.In this study,4 coating materials namely,konjac glucomannan-whey protein isolate(KGM-WPI)film,chitosan-sweet potato starch(CHI-SPS)film,chitosan-bamboo fungus(CHI-BF)film,and chitosan-boehmite alumina(CHI-BAH)have been explored to enhance the shelf life of sea bass during 8 days of refrigerated storage.Overall,CHI-BF was observed to be best in retaining hardness,gumminess and maintaining total volatile basic nitrogen value.Whereas CHI-SPS was found to retain chewiness and maintain lower values for drip loss and peroxide value.CHI-BAH coating was observed to maintain the lower values for pH and EC values of sea bass under refrigerated storage.However,the least increase in total viable count and minimum change in b^(*)value was observed in the case of sea bass coated with KGM-WPI.The current research fi ndings provide a new practical storage method for the entire fresh fish.The fresh fish can be coated with different coating materials and store on the ice at 4℃without packaging during retailing.These film coated whole fresh fish retains its microbial and sensory quality. 展开更多
关键词 Sea bass coating film CHITOSAN Konjac glucomannan Boehmite alumina REFRIGERATION
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THE CURING THEORY OF SILlCONE PAINT AND THE STRUCTURE OF COATING FILM
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作者 王幼平 隋庆海 孙复强 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1992年第3期16-25,共10页
This paper puts forward the two methods of weightlessness and alkoxyl group content determination to calculate the amount of cross-linking agent after elaborating the curing essence of silicone paint under the action ... This paper puts forward the two methods of weightlessness and alkoxyl group content determination to calculate the amount of cross-linking agent after elaborating the curing essence of silicone paint under the action of catalysis , and provides the theoretical basis of fixing the amoount of cross-linking agent accurately and quantitatively. At the same time, the structure of coating film is studied by the use of photoelectronic spectromenter and some other modern technology, and verified in theory. At last, this paper analyses the layer structure and the relationship between it and the coating properties. 展开更多
关键词 PAINT CURING coating film
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Nucleation and growth behavior of coating film on Mg–Al–Zn alloy with different surface topographies via plasma electrolytic oxidation
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作者 Nisa Nashrah Sung Hun Baek Young Gun Ko 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2022年第8期2185-2192,共8页
This work was made to investigate how nucleation and growth behavior of the coating film were affected by surface topographies of Mg–Al–Zn alloy substrate during the initial stage of plasma electrolytic oxidation(PE... This work was made to investigate how nucleation and growth behavior of the coating film were affected by surface topographies of Mg–Al–Zn alloy substrate during the initial stage of plasma electrolytic oxidation(PEO).To satisfy this end,a single substrate was prepared by mechanical treatment exhibiting rough and smooth regions with an equal area on the surface.The rough region with prominent hills and grooves induced the breakdown of passive film,which was indicated by an early appearance of plasma discharge on the rough region since nucleation of coating film occurred preferentially around the hills.However,the coating film grown on the grooves was somewhat thicker and more porous than the film grown on the hills and smooth regions.This was due to the fact that the growth of the coating film was found to be localized in the presence of rough region,which was in line with the discharge activities.Herein,the nucleation and growth behavior during the initial stage of PEO will be discussed schematically on the basis of microstructural interpretation. 展开更多
关键词 Mg alloy Surface roughness Plasma electrolytic oxidation coating film
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ADHESION STRENGTH OF COATING SUBSTRATE AND SURFACE MORPHOLOGY OF PRETREATMENT 被引量:1
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作者 ZhouLanying ZhouHuanjiang YangJian 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第2期217-220,224,共5页
Premature failure of coated tool often results from a poor adhesion of coating-substrate and shortens the lifetime of the tool. The results of increasing the adhesion strength of thin film coatings on cutting tool ins... Premature failure of coated tool often results from a poor adhesion of coating-substrate and shortens the lifetime of the tool. The results of increasing the adhesion strength of thin film coatings on cutting tool inserts by pretreating the inserts with sandblasting technique to obtain a desirable surface morphology of the inserts are presented. A geometric model representing the ideal surface morphology is established to enhance the nucleation density and adhesion strength of coating-substrate. Thin film coating experiment is conducted on the substrates of four different sample groups. Indentation and wear tests are performed on coated inserts to evaluate the effect of sandblasting on the adhesion strength of the coatings. A theoretical analysis is provided on the formation and growth of atom clusters in terms of the contact angle and the thermodynamic barrier of a substrate to predict thin film nucleation. 展开更多
关键词 Thin film coating Adhesion strength Surface morphology
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Spatio-temporal instability of two-layer liquid film at small Reynolds numbers
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作者 王志亮 林松飘 周哲玮 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2010年第1期1-12,共12页
The onset of instability with respect to the spatio-temporally growing disturbance in a viscosity-stratified two-layer liquid film flow is analyzed. The known results obtained from the temporal theory of instability s... The onset of instability with respect to the spatio-temporally growing disturbance in a viscosity-stratified two-layer liquid film flow is analyzed. The known results obtained from the temporal theory of instability show that the flow is unstable in the limit of zero Reynolds numbers. The present theory predicts the neutral stability in the same limit. The discrepancy is explained. Based on the mechanical energy equation, a new mechanism of instability is found. The new mechanism is associated with the convective nature of the disturbance that is not Galilei invariant. 展开更多
关键词 flow instability film coating energy budget low Reynolds number Galilei invariant
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Sensing characteristics of a metal film coated long-period fiber grating
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作者 WANG Yan LIU Jia-ping +2 位作者 LIU Ji-hong HU Xing-liu FANG Ting 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2017年第1期89-96,共8页
To obtain the influence rules of the coating parameters of a long-period fiber grating(LPFG)with respect to temperature,strain and refractive index sensing properties,based on the mode coupling theory,a strict four-la... To obtain the influence rules of the coating parameters of a long-period fiber grating(LPFG)with respect to temperature,strain and refractive index sensing properties,based on the mode coupling theory,a strict four-layer theorietical model of a metal film coated LPFG is established,and these parameters that affect the spectral characteristics of the metal film coated LPFG are studied.The simulation results show that there is an optimal metal film thickness on the surface of the LPFG that will induce the surface-plasmon resonance(SP R)effect,which results in higher sensitivity to the environmental temperature and refractive index but has little influence on the strain There is theoretical evidence that when the silver thickness is between0.8and1.2nm,the refractive index sensitivity will reach the peak point of42.4026,at which the refractive index sensor sensitivity is increased by4.S%.The theoretical results of coating a long-period fiber grating provide a good theoretical basis and guidance for LPFG design and parameters optimization 展开更多
关键词 metal film coated long-period fiber grating (L P FG ) surface plasmon resonance (SP R ) transmission spectrum sensing characteristics
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Scaling relationships of elastic-perfectly plastic film/coating materials from small scale sharp indentation 被引量:2
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作者 WANG ZhaoXin WANG JiRu +5 位作者 WANG Wen Yang NIU YiHan LI Cong ZONG XiangYu ZHANG JianHai ZHAO HongWei 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2021年第6期1302-1310,共9页
The scaling relationships of elastic-perfectly plastic film/coating materials during sharp indentation have been obtained using dimensional analysis and finite-element modeling. Besides the bulk substrate materials, a... The scaling relationships of elastic-perfectly plastic film/coating materials during sharp indentation have been obtained using dimensional analysis and finite-element modeling. Besides the bulk substrate materials, a wide range of film/coating materials with different ratios in term of the Young’s modulus and yield strength were examined, namely different values of Ef/Esand Yf/Es.Based on these scaling relationships, the substrate effects on indentation response and deformed surface profile of residual imprint are given. Furthermore, the scaling relationship among the work of indentation, reduced elastic modulus and hardness has been found. It is found that the ratio of the indentation hardness to measurement of substrate elastic modulus could be used to characterize the wear resistance of film/coating materials. In addition, a novel method to acquire the intrinsic hardness and elastic modulus of film/coating materials is proposed combined with the well-known 10% critical indentation depth rule, which avoids the error caused by estimating the contact area. This work could be contributed for characterizing the mechanical properties of film/coating materials at micro-and nanoscale. 展开更多
关键词 scaling relationships substrate effect dimensional analysis finite element modeling film/coating materials INDENTATION
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Fast Optical Switching Using Oriented Cyanine Dye-Doped Nematic Liquid Crystal 被引量:1
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作者 金朝辉 李忠玉 KASATANI Kazuo OKAMOTO Hiroaki 《Chinese Physics Letters》 SCIE CAS CSCD 2006年第10期2786-2789,共4页
A cyanine dye, 2-[7-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-1,3,5-heptatrienyl]-1,3,3-trimethyl-3H-indolium iodide (NK-125), is doped in 4-cyano-4'-pentylbiphenyl (5 CB), and the mixture is sandwiched ... A cyanine dye, 2-[7-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-1,3,5-heptatrienyl]-1,3,3-trimethyl-3H-indolium iodide (NK-125), is doped in 4-cyano-4'-pentylbiphenyl (5 CB), and the mixture is sandwiched between two pieces of rubbed glass plates. The third-order nonlinear optical properties of the oriented NK-125-SCB layers are measured by the resonant femtosecond degenerate four-wave mixing (DFWM) technique at 760 nm. The third-order nonlinear optical susceptibility of one of the present samples is 5.5×10^-8 esu. The slow DFWM response of the NK-125-SCB layers due to a population grating is accelerated by the increasing laser power because of amplified spontaneous emission (ASE). On the other hand, we do not observe a similar phenomenon for NK-125- polyethylene glycol (PEG-400). Oriented NK-125 molecules in nematic liquid crystals must have very high ASE efficiency. Hence the population grating in a DFWM signal disappears within about 4 ps. It is expected that NK-125-SCB can be used as a material for very fast all-optical switching. 展开更多
关键词 RELAXATION DYNAMICS ENERGY-TRANSFER SQUARYLIUM DYE coating filmS POLYMER-filmS FAST-RESPONSE NONLINEARITIES STATE SUSCEPTIBILITY SPECTROSCOPY
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Heat-denatured and alcalase-hydrolyzed protein films/coatings containing marjoram essential oil and thyme extract
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作者 Ozgür Tarhan Rana Sen 《Food Bioscience》 SCIE 2022年第1期65-74,共10页
In this study,heat-denatured and alcalase-hydrolyzed whey and soy protein films/coatings containing marjoram essential oil(MEO)and thyme extract(TE)were investigated comparatively in terms of physicochemical and funct... In this study,heat-denatured and alcalase-hydrolyzed whey and soy protein films/coatings containing marjoram essential oil(MEO)and thyme extract(TE)were investigated comparatively in terms of physicochemical and functional properties.Heat-denaturated high protein solutions produced self-standing,smooth,transparent and viscoelastic films in the presence of glycerol.Enzymatic hydrolysis provided transparency,elasticity and extensibility to the films of low protein solutions.The addition of MEO and TE triggered hardness and brittleness especially in hydrolyzed high protein films and remarkably changed film color,thickness and viscosity possibly affecting surface adherence of films.Heat denatured films exhibited higher water vapor permeability(WVP)than alcalase-hydrolyzed ones.The lowest hardness was obtained in hydrolyzed low protein films with considerable adhesiveness.Hydrolyzed protein solutions coated to cheese provided better protection against moisture loss and MEO added films caused elevated hardening of cheese.MEO and TE incorporated in film matrices were seemed to suppress mycelial growth and sporulation of Aspergillus niger.This study presented valuable new findings on functional protein films produced by enzymatic hydrolysis as an alternative to heat treatment. 展开更多
关键词 WHEY SOY films and coatings Marjoram essential oil Enzyme hydrolysis
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铝型材阳极电泳涂装中应注意的几个问题 被引量:2
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作者 史宏伟 计海涛 吴伟恒 《铝加工》 CAS 2002年第5期27-29,共3页
从铝型材阳极电泳涂装专业的角度 ,论述了如何选择符合工艺要求的优质涂料以及电泳涂装设备 。
关键词 铝型材 阳极电泳涂装 涂料 电泳涂装装备 漆膜质量
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Formulation Development, in Vitro Evaluation and Stability Study of Aceclofenac Tablet
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作者 Ozgul Gungor Culcu Inci Arasan 《Journal of Chemistry and Chemical Engineering》 2015年第2期101-106,共6页
The objective of the study was to develop film coated tablets of aceclofenac using wet granulation technique. Possible drug-excipient interaction was evaluated by HPLC (high performance liquid chromatography) and FT... The objective of the study was to develop film coated tablets of aceclofenac using wet granulation technique. Possible drug-excipient interaction was evaluated by HPLC (high performance liquid chromatography) and FTIR (fourier infrared spectroscopy). The tablets prepared were assessed for their physicochemical, in vitro dissolution at pH 1.2, 4.5, 6.8 and 7.5 and stability characteristics. Comparison with a commercial aceclofenac product was made in vitro and in vitro studies. There was no interaction between aceclofenac and used excipients. Furthermore, the physicochemical properties of the tablets were satisfactory. The dissolution profile of one of the formulated aceclofenac tablets (D07) was statistically similar (p 〈 0.05) to that of the commercial aceclofenac brand in all the dissolution media. The formulated products ware stable and showed no changes in physical appearance, drug content, or dissolution pattern after storage at 40 ℃/75% RH for 6 months. The results indicate that it is feasible to achieve a stable aceclofenac tablet formulation by using wet granulation technique. 展开更多
关键词 ACECLOFENAC film coated tablets dissolution profiles stability studies.
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Influence of Ozone Injection on Corrosion Behavior of Steel in Water Ballast Tank
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作者 Ryuji Kojima Michiaki Ikai +1 位作者 Jinsun Liao Yoichi Mori 《Journal of Shipping and Ocean Engineering》 2014年第11期327-337,共11页
Ozone is the principal active substances and usually employed in ballast water management systems. In the present study, the corrosion protective effect of ozone was conducted by immersion test and electrochemical tec... Ozone is the principal active substances and usually employed in ballast water management systems. In the present study, the corrosion protective effect of ozone was conducted by immersion test and electrochemical techniques. It was found that corrosion protective effect was revealed in the range of 2.0 to 2.7 ppm of ozone concentration in seawater. The ratio of the rust area of specimen became 20% in that concentration region. The rusted area is strongly influenced by the ozone concentration and the flow rate determined by FEM (finite element method). Ozone has a good influence for ballast tanks, i.e., ozone can delay the rust of ballast tanks, provided that the suitable concentration of ozone is selected. In this case, ozone may stop the corrosion at the defects, if a part of the paint in ballast tank is peeled off. However, ozone may also promote the corrosion of steel when the ozone concentration is very high, e.g., 10 ppm. Attention should be paid to the ozone concentration, if we use ozone as an active substance for ballast water management systems. 展开更多
关键词 OZONE corrosion protective effect water ballast tank coating film electrochemical measurement FEM analysis.
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Deposition and characterization of TiZrV-Pd thin films by dc magnetron sputtering 被引量:1
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作者 王洁 张波 +5 位作者 徐延辉 尉伟 范乐 裴香涛 洪远志 王勇 《Chinese Physics C》 SCIE CAS CSCD 2015年第12期95-99,共5页
TiZrV film is mainly applied in the ultra-high vacuum pipes of storage rings. Thin fihn coatings of palladium, which are added onto the TiZrV film to increase the service life of nonevaporable getters and enhance H2 p... TiZrV film is mainly applied in the ultra-high vacuum pipes of storage rings. Thin fihn coatings of palladium, which are added onto the TiZrV film to increase the service life of nonevaporable getters and enhance H2 pumping speed, were deposited on the inner face of stainless steel pipes by dc magnetron sputtering using argon gas as the sputtering gas. The TiZrV-Pd film properties were investigated by atomic force microscope (AFM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and X-Ray Diffraction (XRD). The grain size of TiZrV and Pd films were about 0.42 1.3 nm and 8.5-18.25 nm respectively. It was found that the roughness of TiZrV films is small, about 2 4 nm, but for Pd film it is large, about 17 19 nm. The PP At. % of Pd in TiZrV/Pd films varied from 86.84 to 87.56 according to the XPS test results. 展开更多
关键词 TiZrV-Pd nonevaporable getters film coating dc magnetron sputtering
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Thermal activation of Ti_((1-x))Au_((x))thin films with enhanced hardness and biocompatibility
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作者 Cecil Cherian Lukose Ioannis Anestopoulos +3 位作者 Theodora Mantso Leon Bowen Mihalis I.Panayiotidis Martin Birkett 《Bioactive Materials》 SCIE 2022年第9期426-445,共20页
The lifetime of orthopaedic implants can be extended by coating the softer Ti6Al4V alloy with harder biocompatible thin films.In this work,thin films of Ti_((1-x))Au_((x))are grown on Ti_(6)Al_(4)V and glass substrate... The lifetime of orthopaedic implants can be extended by coating the softer Ti6Al4V alloy with harder biocompatible thin films.In this work,thin films of Ti_((1-x))Au_((x))are grown on Ti_(6)Al_(4)V and glass substrates by magnetron sputtering in the entire x=0-1 range,before their key biomechanical properties are performance tuned by thermal activation.For the first time,we explore the effect of in-situ substrate heating versus ex-situ post-deposition heat-treatment,on development of mechanical and biocompatibility performance in Ti-Au films.A~250% increase in hardness is achieved for Ti-Au films compared to bulk Ti6Al4V and a~40%improvement from 8.8 GPa as-grown to 11.9 and 12.3 GPa with in-situ and ex-situ heat-treatment respectively,is corelated to changes in structural,morphological and chemical properties,providing insights into the origins of super-hardness in the Ti rich regions of these materials.X-ray diffraction reveals that as-grown films are in nanocrystalline states of Ti-Au intermetallic phases and thermal activation leads to emergence of mechanically hard Ti-Au intermetallics,with films prepared by in-situ substrate heating having enhanced crystalline quality.Surface morphology images show clear changes in grain size,shape and surface roughness following thermal activation,while elemental analysis reveals that in-situ substrate heating is better for development of oxide free Ti3Auβ-phases.All tested Ti-Au films are non-cytotoxic against L929 mouse fibroblast cells,while extremely low leached ion concentrations confirm their biocompatibility.With peak hardness performance tuned to>12 GPa and excellent biocompatibility,Ti-Au films have potential as a future coating technology for load bearing medical implants. 展开更多
关键词 Ti-Au thin film coating HARDNESS Biocompatible L929 mouse fibroblast Implants
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Electrodeposition of nanostructured Ti/(Ru+Ti+Ce)O_2 coatings 被引量:3
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作者 Seyed Mostafa Peyghambari Mardali Yousefpour 《Rare Metals》 SCIE EI CAS CSCD 2018年第1期13-20,共8页
A nanostructured ternary coating of Ti/(Ru + Ti + Ce)O2 was prepared by the conventional electrodeposition on the titanium substrate as the cathode with different numbers of coating layers. The main objective of t... A nanostructured ternary coating of Ti/(Ru + Ti + Ce)O2 was prepared by the conventional electrodeposition on the titanium substrate as the cathode with different numbers of coating layers. The main objective of this work was to study nanostructured coatings of ceramic materials. For this purpose, the amount of precursor materials in the electrolyte was a variable parameter. Furthermore, the salt of TiCl4/RuCl3·xH2 O/Ce(NO3)3·6 H2 O with different amounts, hydrogen peroxide, methanol, and distilled water were used as an aqueousunaqueous bath. In addition, the coated samples were put to heat at 300, 450, 650, and 850℃ in an electric furnace for1 h. The crystalline phase of the coating was characterized by X-ray diffraction(XRD). The chemical composition and microstructure of the coating were studied using energydispersive spectroscopy(EDS) and scanning electron microscopy analysis(SEM). Moreover, the electrochemical measurement of Ti/(Ru + Ti + Ce)O2 coatings was carried out. Results show that with the increase in the number of coating layers, the quality of morphology is improved.Then, the best quality of coatings is obtained at six layers on the titanium substrate with electrolyte including TiO2/RuO2/CeO2 with the molar ratio of 70:5:25 after heat treatment at 450 ℃ for 1 h. Besides,with the increase in Ce02 content from 5 wt% to 25 wt% and the number of coating layers, higher thickness of about(20.0±0.1) μm and minimum over potential for chlorine evolution were obtained. 展开更多
关键词 Oxides coating Heat treatment Interface Thin films
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