scholarly journals Preparation, Microstructure, Mechanical Properties and Biocompatibility of Ta-Coated 3Y-TZP Ceramic Deposited by a Plasma Surface Alloying Technique

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1265 ◽  
Author(s):  
Ke Zheng ◽  
Liangliang Li ◽  
Yaqian Dong ◽  
Jie Gao ◽  
Hongjun Hei ◽  
...  
Keyword(s):  
Compact Surface ◽  
Surface Alloying ◽  
X Ray Diffraction ◽  
Hydrothermal Aging ◽  
Plasma Surface ◽  
X Ray ◽  
Biaxial Flexural Strength ◽  
Proliferation Ability ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying

A Ta coating has been successfully fabricated on the surface of zirconia polycrystals ceramic (3 mol% yttria, 3Y-TZP) by a plasma surface alloying technique. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results showed that a α-Ta coating with a continuous and compact surface morphology which consisted of a deposited layer with a thickness of 390 nm and a diffusion layer with a thickness of 200 nm covered the 3Y-TZP. Due to the effect of inhabitation the t→m transformation by the deposited Ta coating, the biaxial flexural strength caused by the phase transformation during hydrothermal aging is reduced e.g., p < 0.05 after 20 h and/or 100 h. In addition, the Ta coating shows non-cytotoxicity and improved proliferation ability of osteoblasts.

PREPARATION OF COPPER AND CHROMIUM ALLOYED LAYERS ON PURE TITANIUM BY PLASMA SURFACE ALLOYING TECHNOLOGY

2015 ◽  
Vol 22 (04) ◽  
pp. 1550056 ◽  
Author(s):  
XIAOJING HE ◽  
MENG LI ◽  
HUIZHEN WANG ◽  
XIANGYU ZHANG ◽  
BIN TANG
Keyword(s):  
Energy Dispersive Spectrometer ◽  
Antibacterial Properties ◽  
Pure Titanium ◽  
Titanium Substrate ◽  
Antibacterial Activities ◽  
Surface Alloying ◽  
X Ray Diffraction ◽  
Fluorescence Staining ◽  
Plasma Surface ◽  
Plasma Surface Alloying

Cu – Cr alloyed layers with different Cu and Cr contents on pure titanium were obtained by means of plasma surface alloying technology. The microstructure, chemical composition and phase composition of Cu – Cr alloyed layers were analyzed by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD), respectively. The experimental results demonstrate that the alloyed layers are bonded strongly to pure titanium substrate and consist of unbound Ti , CuTi , Cu 3 Ti , CuTi 3 and Cr 2 Ti . The thickness of Cu 5 Cr 5 and Cu 7 Cr 3 alloyed layer are about 18 μm and 28 μm, respectively. The antibacterial properties against gram-negative Escherichia coli (E.coli, ATCC10536) and gram-positive Staphylococcus aureus (S. aureus, ATCC6538) of untreated pure titanium and Cu – Cr alloyed specimen were investigated by live/dead fluorescence staining method. The study shows that Cu – Cr alloyed layers exhibit excellent antibacterial activities against both E.coli and S.aureus within 24 h, which may be attributed to the formation of Cu -containing phases.

A study of nickel-based corrosion resisting alloy layer obtained by double glow plasma surface alloying technique

2000 ◽  
Vol 131 (1-3) ◽  
pp. 378-382 ◽  
Author(s):  
Xu Zhang ◽  
Xishan Xie ◽  
Zhongmin Yang ◽  
Jianxin Dong ◽  
Zhong Xu ◽  
...  
Keyword(s):  
Alloy Layer ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Glow Plasma ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying

Tribological Performance of TiAl Based Alloy Treated with Plasma Surface Chromizing Process

2011 ◽  
Vol 189-193 ◽  
pp. 1091-1095
Author(s):  
Zhi Yong He ◽  
Zhen Xia Wang ◽  
Ying Qin Wang ◽  
Xiao Ping Liu ◽  
Zhong Xu
Keyword(s):  
Wear Resistance ◽  
Room Temperature ◽  
Surface Alloy ◽  
Wear Volume ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Sliding Test ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying ◽  
Wear Condition

TiAl-Cr alloy was prepared on surface of TiAl based alloy by plasma surface alloying technique. The wear resistance of the surface alloy was examined under various wear condition. During the room temperature ball-on-dic sliding test, the TiAl-Cr surface alloy showed reduced friction and improved wear resistance. For the 500°C sliding and room temperature fretting tests, the friction coefficient of TiAl-Cr surface alloy was a little higher than that of TiAl-based alloy, but the wear volume showed significant reducing, the wear resistance was improved obviously. The addition of chromium increases the strength and hardness of the TiAl-based alloy, and therefore the load bearing and anti-adhesion capacity of the surface were also enhanced, these were the main mechanisms for the improvement of wear resistance.

Oxidation Resistance of Ti-6Al-4V by Plasma Niobium Surface Alloying

2007 ◽  
Vol 353-358 ◽  
pp. 1818-1821 ◽  
Author(s):  
Wen Bo Wang ◽  
Zhong Xu ◽  
Zhi Yong He ◽  
Zhen Xia Wang ◽  
Ping Ze Zhang
Keyword(s):  
Oxidation Resistance ◽  
Oxidation Behavior ◽  
Experimental Results ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Modified Layer ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying

A niobium modified layer on Ti-6Al-4V surface was obtained by means of the plasma surface alloying technique. The oxidation behavior of the modified layer was investigated and compared with Ti-6Al-4V at 700°C~900°C for 100h. Composition and microstructure of Ti-6Al-4V and the modified layer after oxidation at 900°C for 100h were analyzed using XRD and SEM respectively. The experimental results showed the oxidation behavior of Ti-6Al-4V at 900°C for 100h was obviously improved after the niobium alloying process.

Corrosion and Wear Behavior of Nitrogen-Doped TiO2 Coatings on Stainless Steel Prepared by Plasma Surface Alloying Technique

2011 ◽  
Vol 687 ◽  
pp. 602-609
Author(s):  
He Feng Wang ◽  
Bin Tang ◽  
Xiu Yan Li ◽  
Yong Ma ◽  
Chen Quan Yang
Keyword(s):  
Stainless Steel ◽  
Wear Behavior ◽  
Hybrid Coatings ◽  
Composition Analysis ◽  
Surface Alloying ◽  
Corrosion Properties ◽  
Plasma Surface ◽  
Nitrogen Doped ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying

A novel process has been developed to improve tribological and corrosion properties of austenitic stainless steel (S. S). Titanium nitride coatings were obtained by plasma surface alloying technique. Nitrogen-doped titanium dioxide was synthesized by oxidative annealing the resulted TiNx coatings in air. The microstructure of TiO2coatings was characterized by SEM, GDOES, XPS and XRD, respectively. Simulated body solution (Hanks’ solution, 37°C) was used to characterize the electrochemical corrosion properties of the coatings and substrate. Ball-on-disc sliding wear was applied to test and compare the tribological behaviors of the coatings and substrate against Al2O3ball. Results reveal that the resultant coatings have a layered structure, comprising of N-doped TiO2layer at the top and a diffuse-type interface. Such a hybrid coatings system shows good adhesion with the substrate. Composition analysis shows that the coatings shield the substrate entirely. The N-doped TiO2coatings are anatase in structure as characterized by X-ray diffraction. The electrochemical measurements show that the corrosion potential positively shifts from -0.267 V for bare S. S to -0.275 V for N-doped TiO2coated S. S, and the corrosion current density decreases from 1.3 × 10-5A/cm2to 4.1 ×10-6A/cm2. Under a load of 7.6 N, the coefficient of friction is in the range of 0.27～0.38 for the N-doped TiO2and the wear rate of the coatings is only one-fourteenth of that for untreated 316L S. S. Duplex-treated N-doped TiO2coatings display much better wear resistance and antifriction performance than that of S. S.

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