Electrophysical Characteristics of the Laser-Glazed Surface Layer in Aluminum Oxide Ceramics

Water vapor corrosion behavior of Ln2Si2O7 (Ln = Nd, Er, Lu), mullite, CaYb4Si3O13 and Al2O3 were investigated at 1500°C. In Ln2Si2O7 phases, Ln = Nd and Er samples were completely dissolved in water vapor environment. CaYb4Si3O13 phase underwent decomposition during the corrosion test. Lu2Si2O7 and mullite showed excellent water vapor corrosion protection. In the case of mullite, Al2O3 rich phase was formed on the surface and the corrosion progression was successfully protected. In the case of Lu2Si2O7 phase, phase transition occurred and the grain boundaries of surface layer were slightly corroded by the corrosion test.

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Delayed fracture of aluminum oxide ceramics with a borosilicate vitreous phase

Refractories ◽

10.1007/bf02306212 ◽

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

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Absorbability of Highly Porous Aluminum Oxide Ceramics

Journal of Materials Science and Engineering A ◽

10.17265/2161-6213/2017.1-2.005 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 4

Author(s):

Katalin Sinkó

Keyword(s):

Aluminum Oxide ◽

Oxide Ceramics ◽

Porous Aluminum ◽

Porous Aluminum Oxide ◽

Highly Porous

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Ablation of aluminum oxide ceramics using femtosecond laser with multiple pulses

Current Applied Physics ◽

10.1016/j.cap.2011.01.030 ◽

2011 ◽

Vol 11 (3) ◽

pp. S301-S305 ◽

Cited By ~ 8

Author(s):

Ching-Yen Ho ◽

Yu-Hsiang Tsai ◽

Cheng-Sao Chen ◽

Mao-Yu Wen

Keyword(s):

Femtosecond Laser ◽

Aluminum Oxide ◽

Oxide Ceramics ◽

Multiple Pulses

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Surface Friction-Electric Treatment of Aluminum Alloys

Proceedings of Higher Educational Institutions Маchine Building ◽

10.18698/0536-1044-2020-10-47-53 ◽

2020 ◽

pp. 47-53

Author(s):

V.R. Edigarov

Keyword(s):

Surface Layer ◽

Aluminum Oxide ◽

Electric Current ◽

Technological Factor ◽

Surface Hardness ◽

Local Deformation ◽

Working Zone ◽

Treatment Zone ◽

Electric Treatment ◽

Oxide Particles

This paper examines a combined friction-electric treatment of surface layers of machine parts made of aluminums alloys. The temperature released during the friction process is the main technological factor of the treatment, and the heat released during the passage of electric current through the local volume of friction-thermal action is an additional heat source. The paper presents the results of studying a surface modification method involving friction-electric treatment of aluminium alloys with reinforcement by aluminium oxide particles under varied technological conditions: density of electric current, pressing force of the tool, shape of the tool working zone and speed of treatment. A hard alloy tool with high temperature resistance was used as a tool for friction-electric treatment. The tool was installed in a mandrel of a special design allowing supply of a modifier representing a mixture of aluminum oxide particles with a surfactant to the treatment zone. Using the friction-electric treatment of the surface layer of samples with reinforcement by aluminum oxide particles it was possible to increase the surface hardness by about 30–40 % and thickness of the hardened layer by 3–5 times due to the local deformation and passage of electric current through the treatment zone, and to improve wear resistance of the surface layer.

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