Laser Ablation of Cobalt-Bound Tungsten Carbide and Aluminium Oxide Ceramic: Experimental Investigation with ANN Modelling and GA Optimisation

2018 ◽  
pp. 21-30
Author(s):  
Ahmed Elkaseer ◽  
Jon Lambarri ◽  
Iban Quintana ◽  
Steffen Scholz
Keyword(s):  
Experimental Investigation ◽  
Laser Ablation ◽  
Tungsten Carbide ◽  
Aluminium Oxide ◽  
Oxide Ceramic

Microstructure Formation and Performance of Reactive Sintered Titanium Oxycarbide Base Ceramic-Ceramic Composites

2019 ◽  
Vol 799 ◽  
pp. 131-135
Author(s):  
Kristjan Juhani ◽  
Jakob Kübarsepp ◽  
Marek Tarraste ◽  
Jüri Pirso ◽  
Mart Viljus
Keyword(s):  
Phase Formation ◽  
Mechanical Performance ◽  
Aluminium Oxide ◽  
High Energy ◽  
Ceramic Composites ◽  
Oxide Ceramic ◽  
Reactive Sintering ◽  
Attritor Milling ◽  
Different Temperatures ◽  
And Performance

Reactive sintering is a process where synthesis reaction of the ceramic phases is combined with sintering (densification) of the composite. Dense lightweight titanium oxycarbide-aluminium oxide ceramic-ceramic composites were produced from titanium dioxide, carbon black as graphite source and aluminium precursors by high energy attritor milling, followed by reactive sintering. Titanium oxycarbide and aluminium oxide phases were synthesized during reactive sintering in situ. To investigate the microstructure evolution and phase formation, the specimens were sintered at different temperatures (600-1725 °C) in vacuum. Scanning electron microscopy and X-ray diffraction were used to analyze the microstructure and phase formation. Mechanical performance (hardness and fracture toughness) was evaluated.

Tungsten carbide precursors as an example for influence of a binder on the particle formation in the nanosecond laser ablation of powdered materials

Talanta ◽  
2010 ◽  
Vol 80 (5) ◽  
pp. 1862-1867 ◽  
Author(s):  
Markéta Holá ◽  
Pavel Mikuška ◽  
Renáta Hanzlíková ◽  
Jozef Kaiser ◽  
Viktor Kanický
Keyword(s):  
Laser Ablation ◽  
Tungsten Carbide ◽  
Particle Formation ◽  
Nanosecond Laser ◽  
Nanosecond Laser Ablation

Experimental investigation into tungsten carbide thin films as solid oxide fuel cell anodes

2016 ◽  
Vol 31 (19) ◽  
pp. 3050-3059 ◽  
Author(s):  
Jun Jiang ◽  
Xiaofei Guan ◽  
Judith Lattimer ◽  
Cynthia Friend ◽  
Atul Verma ◽  
...  
Keyword(s):  
Thin Films ◽  
Experimental Investigation ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Tungsten Carbide ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell Anodes ◽  
Image Position

Abstract

Experimental investigation on surface integrity during machining of AISI 420 steel with tungsten carbide insert

2020 ◽  
Vol 22 ◽  
pp. 992-997
Author(s):  
D. Palanisamy ◽  
A. Devaraju ◽  
D. Arulkirubakaran ◽  
N. Manikandan
Keyword(s):  
Experimental Investigation ◽  
Tungsten Carbide ◽  
Surface Integrity ◽  
Aisi 420 ◽  
Carbide Insert

scholarly journals Testing of Flame Sprayed Al2O3 Matrix Coatings Containing TiO2

2016 ◽  
Vol 61 (3) ◽  
pp. 1363-1370 ◽  
Author(s):  
A. Czupryński ◽  
J. Górka ◽  
M. Adamiak ◽  
B. Tomiczek
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Steel Substrate ◽  
Aluminium Oxide ◽  
Ceramic Coatings ◽  
Abrasive Wear Resistance ◽  
Flame Spraying ◽  
Oxide Ceramic ◽  
Al2o3 Matrix ◽  
External Coating

Abstract The paper presents the results of the properties of flame sprayed ceramic coatings using oxide ceramic materials coating of a powdered aluminium oxide (Al2O3) matrix with 3% titanium oxide (TiO2) applied to unalloyed S235JR grade structural steel. A primer consisting of a metallic Ni-Al-Mo based powder has been applied to plates with dimensions of 5×200×300 mm and front surfaces of Ø40×50 mm cylinders. Flame spraying of primer coating was made using a RotoTec 80 torch, and an external coating was made with a CastoDyn DS 8000 torch. Evaluation of the coating properties was conducted using metallographic testing, phase composition research, measurement of microhardness, substrate coating adhesion (acc. to EN 582:1996 standard), erosion wear resistance (acc. to ASTM G76-95 standard), and abrasive wear resistance (acc. to ASTM G65 standard) and thermal impact. The testing performed has demonstrated that flame spraying with 97% Al2O3 powder containing 3% TiO2 performed in a range of parameters allows for obtaining high-quality ceramic coatings with thickness up to ca. 500 µm on a steel base. Spray coating possesses a structure consisting mainly of aluminium oxide and a small amount of NiAl10O16 and NiAl32O49 phases. The bonding primer coat sprayed with the Ni-Al-Mo powder to the steel substrate and external coating sprayed with the 97% Al2O3 powder with 3% TiO2 addition demonstrates mechanical bonding characteristics. The coating is characterized by a high adhesion to the base amounting to 6.5 MPa. Average hardness of the external coating is ca. 780 HV. The obtained coatings are characterized by high erosion and abrasive wear resistance and the resistance to effects of cyclic thermal shock.

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