PICALO 2008 Paper #P219 (Surface Roughness Analysis and Improvement of Pmma-Based Micro-Fluidic Chip Chamber by Co2 Laser Cutting)
Surface Roughness Analysis and Improvement of Pmma-Based Micro-Fluidic Chip Chamber by Co2 Laser Cutting
Authors:
Huang Yongguang, Beijing University of Technology; Beijing Peoples Republic of China
Liu Shibing, Beijing University of Technology; Beijing Peoples Republic of China
Presented at PICALO 2008
We study the sidewall surface roughness of chamber in the PMMA-base microfuidic chip which was cutting with CW CO2 laser. Our observations shows that the roughness is resulted from the bubble burst and form the residues. In order to improve the quality of the surface, we proposed a very easy way which just put the chip in high suitable ambient temperature, found that at 70-90°C wou...$28.00
PICALO 2008 Paper #P220 (Micro Processing with High Repetition Rate Pulsed Fibre Lasers)
Micro Processing with High Repetition Rate Pulsed Fibre Lasers
Authors:
Jack Gabzdyl, SPI Lasers; Southampton Great Britain
Tony Hoult, Spi Lasers Llc; Santa Clara CA USA
Lu Ming, Spi Lasers; Southhampton Great Britain
Presented at PICALO 2008
Traditional q-switched laser sources have been limited in pulse frequency and in overall control of pulse energy and length. A novel pulsed fibre laser capable of operation from cw through to 500kHz has provided a tool that has enabled a number of significant processing improvements. The benefits of operating in the >100kHz regime, encompassing both quality and productivity, is evident in a number of applications such as; marking...$28.00
PICALO 2008 Paper #P223 (Derivation of Optimal Processing Parameters for Conduction Mode Laser Beam Welds by Simulation)
Derivation of Optimal Processing Parameters for Conduction Mode Laser Beam Welds by Simulation
Authors:
Achim Mahrle, TU Dresden / IOF - LOT; Dresden Germany
Eckhard Beyer, Fraunhofer Iws; Dresden Germany
Presented at PICALO 2008
Conduction-limited laser beam welding processes are characterized by moderate laser intensities below the threshold intensity necessary for keyhole formation. The absorbed energy at the surface of the weld specimen is transferred into the material by heat conduction and convection. These processes are relatively slow. Consequently, the penetration depth of the fusion zone and/or the possible welding speeds are limited to considerably lower values than in d...$28.00
PICALO 2008 Paper #P224 (Study of the Laser Assisted Vapor Condensation Method for Generating Metallic Nano-Particles)
Study of the Laser Assisted Vapor Condensation Method for Generating Metallic Nano-Particles
Authors:
Jehnming Lin, National Cheng Kung University; Tainan Taiwan
Jen-Hong Jang, Ncku; Tainan Taiwan
Presented at PICALO 2008
Nano-particles possess unique characteristics of the optical, electrical and mechanical properties. Many efforts have been made on the fabrication and characterization of nano-particles during the recent decades. In this study the synthesis of metallic nano-particles by condensation method is generated by a pulse laser irradiated on a metallic target with a rapid evaporation in an inert jet flow condenser. In the simulation analysis of local ablation phenomenon i...$28.00
PICALO 2008 Paper #P229 (Temperature Field Simulation of Ta2O5 Ceramics by Co2 Laser Irradiation)
Temperature Field Simulation of Ta2O5 Ceramics by Co2 Laser Irradiation
Authors:
Xinyu Du, Beijing University of Technology ; Beijing Peoples Republic of China
Lingfei Ji, Beijing University of Technology; Beijing Peoples Republic of China
Yijian Jiang, Beijing University of Technology; Beijing Peoples Republic of China
Presented at PICALO 2008
Tantalum-pentoxide (Ta2O5) is considered as a promising nonsilicon oxide dielectric for practical application in the field of microelectronic. It has been reported that the physical properties of the Ta2O5 ceramics can be improved by laser irradiation. In the present work, a finite-element model is developed to exploring the rea...$28.00
PICALO 2008 Paper #P230 (Laser Cladding of Az91D Magnesium Alloy with Ni-Si-Mg)
Laser Cladding of Az91D Magnesium Alloy with Ni-Si-Mg
Authors:
Ding Fan, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Jianbin Zhang, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Yufeng Zheng, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Qiang Li, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Presented at PICALO 2008
AZ91D Magnesium alloy was laser cladded with Ni-Si-Mg to enhance the surface hardness. The microstructures and phases of the cladded zone were characterized by optical microscope (OM), scanning electron microscope (SEM), and X-ray diffractometer (XRD). Th...$28.00
PICALO 2008 Paper #P231 (Characterization of Laser Cladding Calcium Phosphate Coatings on Titanium Substrate)
Characterization of Laser Cladding Calcium Phosphate Coatings on Titanium Substrate
Authors:
Min Zheng, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Xiukun Li, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Ding Fan, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Jianbin Zhang, Lanzhou University of Technology; Lanzhou Peoples Republic of China
Presented at PICALO 2008
Laser cladding has become an extensively attractive technique in the field of biomaterials. Significant effort has been devoted to combine mechanical properties of metal with biologic properties of bioceramic by this technique....$28.00
PICALO 2008 Paper #P233 (A Novel Multi-Functional Fiber Grating Sensor with Self-Demodulation and Discrimination Capabilities)
A Novel Multi-Functional Fiber Grating Sensor with Self-Demodulation and Discrimination Capabilities
Authors:
Yage Zhan, Physics Department, Donghua University; Shanghai Peoples Republic of China
Presented at PICALO 2008
A novel multi-functional fiber grating sensor with self-demodulation and discrimination capabilities was presented in this paper. The sensor can measure strain, vibration common temperature (-10-100ºC), high temperature (100-800ºC), pressure, etc. There are three fiber Bragg gratings (FBGs) and one fiber long period grating (LPG) in the system. FBG1 and FBG2 can be used as common temperature, strain, vibration and pressure sensing head, arbitrary two of them can be measured ...$28.00
PICALO 2008 Paper #P235 (The Influence of the Shielding Gas on Process Properties during Laser Welding)
The Influence of the Shielding Gas on Process Properties during Laser Welding
Authors:
Duan Aiqin, Bamtri; Beijing Peoples Republic of China
Chen Li, National Key Lab for High Density Beam Processing Technology ; Beijing Peoples Republic of China
Hu Lunji, Huazhong University of Science and Technology ; Beijing Peoples Republic of China
Presented at PICALO 2008
Many studies have shown that type and flow rate of shielding gas are important to weld depth and weld quality during laser welding. These results are because different shielding gas can modify the coupling of laser radiation into the workpiece. In this paper, high-speed camera and optical emissions monitoring...$28.00
PICALO 2008 Paper #P237 (Research on Laser Transmission Welding Pvc)
Research on Laser Transmission Welding Pvc
Authors:
Huixia Liu, Jiangsu University; Zhenjiang Peoples Republic of China
An Xing, Jiangsu University; Zhenjiang Peoples Republic of China
Cheng Chen, Jiangsu University; Zhenjiang Peoples Republic of China
Huizhong Zhang, Jiangsu University; Zhenjiang Peoples Republic of China
Xiao Wang, Jiangsu University; Zhenjiang Peoples Republic of China
Presented at PICALO 2008
The influence of process parameter of laser transmission welding of PVC on welding quality has been studied using method of orthogonal design. The tension and section tests are conducted for experimental samples, and the influence of ...$28.00
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