Ablation of aluminum oxide ceramics using femtosecond laser with multiple pulses

2011 ◽  
Vol 11 (3) ◽  
pp. S301-S305 ◽  
Author(s):  
Ching-Yen Ho ◽  
Yu-Hsiang Tsai ◽  
Cheng-Sao Chen ◽  
Mao-Yu Wen
Keyword(s):  
Femtosecond Laser ◽  
Aluminum Oxide ◽  
Oxide Ceramics ◽  
Multiple Pulses

Effect of hot isostatic pressing on the mechanical properties of aluminum oxide ceramics

1997 ◽  
Vol 38 (1) ◽  
pp. 9-12 ◽  
Author(s):  
S. M. Barinov ◽  
V. F. Ponomarev ◽  
V. Ya. Shevchenko
Keyword(s):  
Mechanical Properties ◽  
Aluminum Oxide ◽  
Hot Isostatic Pressing ◽  
Oxide Ceramics ◽  
Isostatic Pressing

Green Machining of Aluminum Oxide Ceramics

2007 ◽  
pp. 371-376 ◽  
Author(s):  
Fritz Klocke ◽  
Dietmar Phler ◽  
Christoph Schippers ◽  
Christian Schmidt
Keyword(s):  
Aluminum Oxide ◽  
Oxide Ceramics ◽  
Green Machining

scholarly journals Study of the formation of 3-D titania nanofibrous structure by MHz femtosecond laser in ambient air

2021 ◽  
Author(s):  
Amirhossein Tavangar ◽  
Bo Tan ◽  
Krishnan Venkatakrishnan
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Deposition Rate ◽  
Femtosecond Laser Ablation ◽  
Ambient Air ◽  
Experimental Results ◽  
Laser Parameters ◽  
Nanofibrous Structure ◽  
Titania Nanostructures ◽  
Multiple Pulses

In this study, we describe the formation mechanism of web-like three-dimensional (3-D) titania nanofibrous structures during femtosecond laser ablation of titanium (Ti) targets in the presence of background air. First, we demonstrate the mechanism of ablation of Ti targets by multiple femtosecond laser pulses at ambient air in an explicit analytical form. The formulas for evaporation rates and the number of ablated particles, which is analogous to the deposition rate of the synthesized nanofibers, for the ablation by a single pulse and multiple pulses as a function of laser parameters, background gas, and material properties are predicted and compared to experimental results. Afterwards, the formation of nanofibrous structures is demonstrated by applying an existing simplified kinetic model to Ti targets and ambient conditions. The predicted theory provides nanofiber diameter dependency with the combination of laser parameters, target properties, and ambient gas characteristics. Experimental studies are then performed on titania nanofibrous structures synthesized by laser ablation of Ti targets using MHz repletion-rate femtosecond laser at ambient air. The models' predictions are then compared with the experimental results, where nanostructures with different morphologies are manufactured by altering laser parameters. Our results indicate that femtosecond laser ablation of Ti targets at air background yields crystalline titania nanostructures. The formation of crystalline titania nanostructures is preceded b thermal mechanism of nucleation and growth. The results point out that laser pulse repetition and dwell time can control the density, size, and pore size of the engineered nanofibrous structure. As the deposition rate of nanostructures is analogous to the ablation rate of the target, higher density of nanofibrous structure is seen at greater laser fluences. The predicted theory can be applied to predict ablation mechanism and nanofiber formation of different materials.

Design of porous aluminum oxide ceramics using magnetic field-assisted freeze-casting

2020 ◽  
Vol 35 (21) ◽  
pp. 2859-2869
Author(s):  
Said Bakkar ◽  
Jihyung Lee ◽  
Nicholas Ku ◽  
Diana Berman ◽  
Samir M. Aouadi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Aluminum Oxide ◽  
Oxide Ceramics ◽  
Freeze Casting ◽  
Porous Aluminum ◽  
Porous Aluminum Oxide

Abstract

Delayed fracture of aluminum oxide ceramics with a borosilicate vitreous phase

Refractories ◽  
1996 ◽  
Vol 37 (12) ◽  
pp. 436-438
Author(s):  
S. M. Barinov ◽  
S. V. Orlov ◽  
V. Ya. Shevchenko ◽  
N. V. Ivanov
Keyword(s):  
Aluminum Oxide ◽  
Oxide Ceramics ◽  
Vitreous Phase ◽  
Delayed Fracture

scholarly journals Fluorescence enhanced lab-on-a-chip patterned using a hybrid technique of femtosecond laser direct writing and anodized aluminum oxide porous nanostructuring

2019 ◽  
Vol 1 (9) ◽  
pp. 3474-3484 ◽  
Author(s):  
Zhi Yu ◽  
Yuhao Lei ◽  
Weili Yu ◽  
Jinluo Cheng ◽  
Jun Xing ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Aluminum Oxide ◽  
Lab On A Chip ◽  
Hybrid Technique ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Anodized Aluminum ◽  
Anodized Aluminum Oxide ◽  
Structure Detection ◽  
Array Structure

A nanoporous array structure detection chip with strong spectral resolution, fabricated by femtosecond laser direct writing and anodized aluminum oxide.

Sintering kinetics of aluminum oxide ceramics with an additive of eutectic composition

2000 ◽  
Vol 57 (1-2) ◽  
pp. 23-25 ◽  
Author(s):  
E. S. Lukin ◽  
N. A. Makarov
Keyword(s):  
Aluminum Oxide ◽  
Eutectic Composition ◽  
Oxide Ceramics ◽  
Sintering Kinetics ◽  
Kinetics Of
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