Effect of Different Nd2O3Contents on Performances of Rare Earth Active Bioceramic Gradient Coating Produced by Wide-Band Laser Cladding

2011 ◽  
Vol 38 (5) ◽  
pp. 0506003 ◽  
Author(s):  
汪震 Wang Zhen ◽  
刘其斌 Liu Qibin ◽  
肖明 Xiao Ming ◽  
杨邦成 Yang Bangcheng
Keyword(s):  
Rare Earth ◽  
Laser Cladding ◽  
Wide Band ◽  
Gradient Coating

The Bioactivity of Gradient Composite Bioceramic Coating with Different Contents of Multiple Rare Earth Deoxide Fabricated by Wide Band Laser Cladding

2013 ◽  
Vol 706-708 ◽  
pp. 318-322 ◽  
Author(s):  
Ling Yan Zhang ◽  
Qi Bin Liu
Keyword(s):  
Titanium Alloy ◽  
Rare Earth ◽  
Thermal Stress ◽  
Laser Cladding ◽  
Bonding Strength ◽  
Wide Band ◽  
Experimental Results ◽  
Spherical Particles ◽  
Coating Materials ◽  
Gradient Coating

To improve bonding strength between titanium alloy and coating and to eliminate thermal stress during laser cladding, a gradient coating materials is designed. And the gradient coating with different contents of multiple rare earth deoxide was produced by wide band laser cladding technique. The experimental results indicate that when addition of Sm2O3 is fixed to 0.3wt.%, as addition of Y2O3 increases, the microstructure of bioceramic is different. When addition of Y2O3 reaches 0.4wt.%, the amount of Ca-P based bioactive phases such as HA, α-TCP as well as β-TCP becomes biggest. After soaking the coating with 0.3wt.% Sm2O3 and 0.4wt.% Y2O3 in SBF for 14 days, a large amount of Ca-P white spherical particles can be observed on coating, which demonstrates the bioceramic coating is of best bioactivity.

Effect of Rare Earth Y2O3 Content on Microstructure of Gradient Bioceramic Composite Coating Produced by Wide-Band Laser Cladding

2005 ◽  
Vol 288-289 ◽  
pp. 351-354 ◽  
Author(s):  
Qi Bin Liu ◽  
Long Jiang Zou ◽  
Min Zheng ◽  
Chuang Dong
Keyword(s):  
Rare Earth ◽  
Composite Coating ◽  
Laser Cladding ◽  
Dominant Role ◽  
Monosodium Glutamate ◽  
Wide Band ◽  
Experimental Results ◽  
Ti Alloy ◽  
Y2o3 Content ◽  
Rare Earth Content

In the present paper, bioceramic coating with gradient compositional design was prepared on surface of Ti alloy by using wide-band laser cladding. Effect of rare earth Y2O3 content on gradient bioceramic composite coating was studied. The experimental results indicated that adding rare earth can refine grain. Different contents of rare earth affect formation of HA andβ-TCP in bioceramic coating. With increase of rare earth content, HA andβ-TCP were synthesized. When content of rare earth ranged from 0.4% to 0.6%, the active extent of rare earth in synthesizing HA andβ-TCP got best, which indicated that “monosodium glutamate” effect of rare earth played a dominant role. However, when rare earth content was up to 0.8%, the active extent of rare earth in synthesizing HA and β-TCP conversely went down, which demonstrated that rare earth gradually lost its catalysis in manufacturing HA andβ-TCP.

The Biocompatibility and Bioactivity of Gradient Composite Bioceramic Coating with Different Content of Nd2O3 Fabricated by Wide Band Laser Cladding

2011 ◽  
Vol 415-417 ◽  
pp. 1837-1840 ◽  
Author(s):  
Ming Xiao ◽  
Qi Bin Liu ◽  
Yi Zhi Zhu
Keyword(s):  
Rare Earth ◽  
Thermal Stress ◽  
Laser Cladding ◽  
Wide Band ◽  
Composition Gradient ◽  
Ti Alloy ◽  
Coating Composition ◽  
Gradient Coatings ◽  
Different Content ◽  
Number Of Cells

To eliminate thermal stress during laser cladding and to raise the bonding strength between substrate and coating, composition gradient coatings are designed and fabricated by using wide-band laser cladding technique on a Ti alloy. The rare earth Nd2O3 was added to improve the properties of the bioceramic coating. The experimental results indicate that when the adding of Nd2O3 reaches 0.6wt%, the characteristic peaks of HA and β-TCP are the highest, which demonstrates the amount of HA and β-TCP is the largest. However, when the content of Nd2O3 is up to 0.8wt%, the peaks of HA and β-TCP conversely goes down. The biocompatibility and bioactivity are related to the amount of HA and β-TCP catalyzed by Nd2O3. When the content of Nd2O3 is 0.6wt%, the number of cells proliferated and the ALP secreted on coatings is the most, which indicate the biocompatibility and bioactivity of gradient bioceramic coating is the best.

Effect of Mixed Multiple Rare Earth Oxide on the Microstructure of Bioceramic Coating Prepared by Wide Band Laser Cladding

2014 ◽  
Vol 989-994 ◽  
pp. 775-778
Author(s):  
Zheng Zhang ◽  
Qi Bin Liu ◽  
Ling Yan Zhang ◽  
Hai Bin Jiang ◽  
Pei Ze Jiang
Keyword(s):  
Titanium Alloy ◽  
Rare Earth ◽  
Laser Cladding ◽  
Rare Earths ◽  
Wide Band ◽  
Rare Earth Oxide ◽  
Experimental Results ◽  
Bioceramic Coatings

In order to researching the microstructure of bioceramic coating on the surface medical titanium alloy (Ti–6Al–4V), the gradient bioceramic coatings are fabricated by wide-band laser cladding. The influence of multiple rare earths oxide La2O3 and CeO2 on microstructure of bioceramic coating were studied. The experimental results demonstrated that mixed La2O3 and CeO2 have an effect on forming-ability of HA\β-TCP in bioceramic coating and also refined the grain of bioceramic coatings. The largest amount of HA\β-TCP is presented among all the groups when the contents of La2O3 and CeO2 are 0.6wt.%, 0.4 wt.%, respectively.

The Microstructure of Gradient Composite Bioceramic Coating with Single and Multiple Rare Earth Oxide Fabricated by Wide Band Laser Cladding

2013 ◽  
Vol 341-342 ◽  
pp. 171-174
Author(s):  
Ling Yan Zhang ◽  
Qi Bin Liu ◽  
Pei Ze Jiang ◽  
Zheng Zhang
Keyword(s):  
Rare Earth ◽  
Thermal Stress ◽  
Coral Reef ◽  
Laser Cladding ◽  
Bonding Strength ◽  
Wide Band ◽  
Rare Earth Oxide ◽  
Spherical Particles ◽  
Ti Alloy ◽  
Coating Materials

To improve bonding strength between Ti alloy and bioceramic coating and to eliminate thermal stress during laser cladding, gradient bioceramic coating materials is designed. The bioceramic coating is fabricated by wide band laser cladding technique. And the effect of adding single and multiple rare earth oxide on microstructure is investigated. The samples are soaked with SBF for 14 days, the experimental results indicate that when the content of single rare earth oxide is 0.6wt.%Y2O3, a large number of bioactivity phase and chrysanthemum shape microstructure can be observed. When the content of single rare earth oxide is 0.2wt.%Sm2O3, a lot of bioactivity phase and coral reef shape microstructure can be observed. When the content of multiple rare earth oxide is 0.3wt.%Sm2O3 and 0.4wt.%Y2O3, a large amount of bioactivity phase and more homogeneous and dense spherical particles can be observed on coating, which demonstrates the microstructure is of better bioactivity.

The Bioactivity of Gradient Composite Bioceramic Coating with Two Kinds of Rare Earth Oxide Fabricated by Wide Band Laser Cladding

2014 ◽  
Vol 989-994 ◽  
pp. 767-770
Author(s):  
Pei Ze Jiang ◽  
Qi Bin Liu ◽  
Ling Yan Zhang ◽  
Hai Bin Jiang ◽  
Zheng Zhang
Keyword(s):  
Rare Earth ◽  
Laser Cladding ◽  
Wide Band ◽  
Rare Earth Oxide ◽  
Experimental Results ◽  
Addition Amount

To improve bioactivity of gradient bioceramic coating, the coating with two kinds of rare earth oxide was produced by wide band laser cladding technique. As the experimental results, whichadded0.6wt.% La2O3 fixedly, and increased the addition amount of the CeO2, when the addition of CeO2fulfill 0.4wt.%, the amount of HA-β-TCP is the largest in this experiment. Soaking the specimens in SBF for 14 days, the coating blended 0.6wt% La2O3 and 0.4wt% CeO2, then a great quantity of Ca-P white particles can be found on coating, which confirmation this bioceramic coating is of best bioactivity.

Laser cladding with wide-band scanning rotative polygon mirror

1989 ◽  
Author(s):  
Xi-Chen Yang ◽  
Yu-He Yan ◽  
Men-Lin Zhong ◽  
Jiang-Ting Zhang ◽  
Nai-Kun Zhang ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Wide Band

Rare Earth Doped Zinc Oxide Nanowires

2008 ◽  
Vol 8 (1) ◽  
pp. 244-251 ◽  
Author(s):  
S. Geburt ◽  
D. Stichtenoth ◽  
S. Müller ◽  
W. Dewald ◽  
C. Ronning ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Rare Earth ◽  
Thermal Quenching ◽  
Wide Band ◽  
Wide Band Gap ◽  
Oxide Nanowires ◽  
Defect Sites ◽  
Optical Activation ◽  
Re Elements ◽  
Rare Earth Doped

Zinc oxide (ZnO) nanowires were grown via thermal transport and subsequently doped with different concentrations of Tm, Yb, and Eu using ion implantation and post annealing. High ion fluences lead to morphology changes due to sputtering; however, freestanding nanowires become less damaged compared to those attached to substrates. No other phases like rare earth (RE) oxides were detected, no amorphization occurs in any sample, and homogeneous doping with the desired concentrations was achieved. Photoluminescence measurements demonstrate the optical activation of trivalent RE-elements and the emission of the characteristic intra-4f-luminescence of the respective RE atoms, which could be assigned according to the Dieke-diagram. An increasing RE concentration results into decreasing luminescence intensity caused by energy transfer mechanisms to non-radiative remaining implantation defect sites. Furthermore, low thermal quenching was observed due to the considerable wide band gap of ZnO.

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