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

Bioactivity of Gradient Rare Earths Bioceramic Coating Produced by Wide-Band Laser Cladding

Applied laser ◽  
2012 ◽  
Vol 32 (5) ◽  
pp. 384-389
Author(s):  
李明 Li Ming ◽  
汪震 Wang Zhen
Keyword(s):  
Laser Cladding ◽  
Rare Earths ◽  
Wide Band

Laser cladding by 10KW–CO2 laser wide–band scanning pyramid mirror

1994 ◽  
Author(s):  
Yang Xi-Chen ◽  
Wang Bao-Qi ◽  
Wang Yun-Shan ◽  
Zhao Xin ◽  
Cha Hong-Kui ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Co2 Laser ◽  
Wide Band

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.

Microstructure and Biocompatibility of Gradient Bioceramic Composite Coating Fabricated by Wide-Band Laser Cladding

2007 ◽  
Vol 342-343 ◽  
pp. 685-688 ◽  
Author(s):  
Qi Bin Liu ◽  
Wen Fei Li ◽  
Bang Cheng Yang
Keyword(s):  
Bone Tissue ◽  
Chronic Inflammation ◽  
Composite Coating ◽  
Laser Cladding ◽  
Transition Layer ◽  
Wide Band ◽  
Pathological Changes ◽  
Hard Tissues ◽  
Piled Structure ◽  
Bioceramic Coatings

In this study, microstructure and biocompatibility of gradient bioceramic composite coating fabricated by Wide-Band Laser Cladding is investigated. The experimental results indicate that the coating consists of an alloyed transition layer and the bioceramic coating. The bioceramic coating is mainly comprised of HA, CaTiO3, CaO, α-TCP, β-TCP and TiO. The coral-shaped structure and short-rod piled structure existing on the surface of coating. After the implantation of the bioceramic coatings into dogs’ femur for 6, 12, and 24 weeks, hypersusceptibility, rejection and pathological changes are not found. No fiber cyst, necrosis of bone tissue and chronic inflammation obviously appear through slice observation of hard tissues. The bioceramic coating with different ratios of Ca : P have different abilities to induce osteogenesis. At Ca: P=1.4 and 0.6wt.% Y2O3 (No.3 sample), the bioceramic coating is of best bioactivity and biocompatibility.

The Bioactivity of Gradient Composite Bioceramic Coating with La2O3 Fabricated by Wide Band Laser Cladding

2013 ◽  
Vol 668 ◽  
pp. 91-95
Author(s):  
Qi Bin Liu ◽  
Bang Cheng Yang
Keyword(s):  
Laser Cladding ◽  
Rare Earths ◽  
Wide Band ◽  
Tc4 Alloy ◽  
Good Biocompatibility ◽  
Gradient Coatings ◽  
Number Of Cells

To improve the quality of bioceramic gradient coatings, wide band laser cladding technique was adopted to produce a kind of gradient composite bioceramic coating, which combines the good biocompatibility of HA and β-TCP with good toughness and strength of TC4 alloy. The rare earths oxide La2O3 was added to improve the properties of the bioceramic coating. The results indicate that when the adding of La2O3 is 0.6wt%, the ceramics coating is of the largest amount of HA and β-TCP catalyzed, and the number of cells proliferated and the ALP secreted on coatings is the biggest, which indicates that the biocompatibility and bioactivity of gradient bioceramic coating is the best. The biocompatibility and bioactivity are closely related to the amount of HA and β-TCP catalyzed by La2O3.

Bioactivity of Human Osteoblasts in the Rare Earths Bioceramic Coating Surface Produced by Wide-Band Laser Cladding

Applied laser ◽  
2013 ◽  
Vol 33 (6) ◽  
pp. 628-632
Author(s):  
李宾 Li Bin ◽  
田兴强 Tian Xingqiang ◽  
汪震 Wang Zhen
Keyword(s):  
Laser Cladding ◽  
Rare Earths ◽  
Wide Band ◽  
Human Osteoblasts ◽  
Coating Surface

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.

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