OXIDE CERAMIC SURFACE LAYER MODIFICATION
USING CONTINUOUS LASER RADIATION
V. V. Kuzin
Translated from Novye Ogneupory, No. 1, pp. 50 – 55, January, 2016.
Original article submitted December 22, 2015.
Features of laser modification of a ceramic surface layer based on aluminum oxide under action of continuous
laser radiation are studied. The effect of a continuous laser action regime on track formation geometric param
eters, and oxide ceramic surface layer morphology and defectiveness is determined. The main types of recur
rent microstructures formed within a ceramic modified surface layer are identified and studied.
Keywords: oxide ceramic, surface layer, modification, laser radiation, recurrent microstructures, morphol
Use of laser technology is capable of providing effective
modification of the surface layers of various ceramic materi-
als, forming a structure within it with micron and nanometer
parameters, and also of reducing the number of surface de-
fects [1 – 3]. This effect is achieved due to rapid action of la-
ser beam on local areas of a ceramic surface, melting mate-
rial, hydrodynamic processes, and sublimation and crystalli
zation . The favorable effect of laser modification makes
it possible to evaluate optimistically the promise of slowing
down processes of structural defect generation and accumu
lation in a ceramic object surface layer during operation
However, unfavorable consequences are superimposed
on advantages of ceramic material surface layer laser modifi
cation, connected with its nonuniform melting and genera
tion of new defects. Exclusion of these disadvantages as
sumes development of rational conditions and laser modifi
cation regimes based on a detailed study of the nature of ac
tion of a laser beam on a surface layer and determination of
the mechanism of its structural rebuilding. Only with resolu
tion of this problem is it possible to recommend laser modifi
cation as a finishing operation for ceramic object manufac
Features have been revealed in [7 – 9] of structural modi-
fication of a ceramic material surface layer, having high
structural inhomogeneity, complex chemical composition,
high melting temperature, and evaporation of the main com-
ponents under pulsed laser action. Concerning continuous la-
ser treatment there is also a requirement for carrying out de-
tailed experimental studies.
The aim of this work is to study features of ceramic sur-
face layer based on aluminum oxide laser modification under
action of continuous laser radiation.
An LK-200-V (NTO IRÉ-Polyus) unit was used in ex
perimental studies fitted with an ytterbium fiber laser with
diode excitation that generates a beam a width of 1070 nm.
Laser radiation power was measured in experiments (P =
12 – 200 W) and beam displacement rate (v = 2 – 180 mm/sec),
and the laser beam diameter remained constant (d = 100 mm).
A surface layer was modified on previously ground speci
mens of oxide ceramic with a size of 12 ´ 12 ´ 5 mm. The
surface selected for laser treatment had roughness Ra = 0.1 mm.
A track 4.5 mm long was formed at these surfaces using a
single coordinate treatment scheme. After laser treatment
specimens were give ultrasonic cleaning in a Powersonic
In order to analyze surface condition, measure track
width and depth formed, an Olympus BX51M optical micro
scope, a TESCAN VEGA 3LMH scanning electron micro
Refractories and Industrial Ceramics Vol. 57, No. 1, May, 2016
1083-4877/16/05701-0053 © 2016 Springer Science+Business Media New York
FGBOU VPO Moscow State Technological University Stankin,