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Ceramic Coatings and
Coated Components
What is Thermal Spray Coating?
A coating is produced by a process
in which molten or semi-molten particles
are applied by impact onto a substrate.
The impacting molten particles rapidly
solidify on the substrate to form a
coating. This process is called a cold
process (relative to the substrate
material being coated) as the substrate
temperature can be kept low during
processing avoiding damage, metallurgical
changes and distortion to the substrate
material.
Process:
Schematic View of Detonation Process
Thermal spray coating involves heating a
material, in powder or wire form, to a
molten or semi-molten state. The material
is propelled using a stream of gas or
compressed air to deposit it, creating a
surface structure on a given substrate.
The coating material may consist of a
single element, but is often an alloy or
composite ceramic with unique physical
properties that are only achievable
through the thermal spray process.
Thermal spray coatings can be the most
cost-effective means of protecting
substrate surfaces from wear or
corrosion. Other primary uses of
thermally sprayed coatings include
dimensional restoration, maintaining
precise clearances, and modifying thermal
and electrical properties.
Commonly Used Ceramic Coating Materials
Grey Alumina
Titanium Dioxide
White Alumina
Chromium Oxide
Alumina Titania Composite
Chromium Oxide Silica Composite
Zirconia
Zirconium Oxide Composite
Magnesium Zirconate
Yttria Stabilized Zirconia
Properties Of Thermal Spray Coatings
|
COATING TYPE |
MAX. COATING THICKNESS POSSIBLE |
MAX. COATING HARDNESS POSSIBLE |
|
Metals & Alloys |
20 microns to a few mm |
60 HRC |
|
Ceramics |
50 microns to 1000 microns |
72 HRC |
|
Carbides |
20 to 500 microns |
72 HRC |
Features and Benefits:
Excellent bond strength of the coatings
Very dense coatings. Porosity less than
1%
Higher thickness coatings easily
possible
Higher productivity
Better coating characteristics in terms
of hardness, wear & corrosion resistance
Versatile process, ensuring wide range
of coatings
Can be easily automated
Low substrate temperature enables
spraying of precision components
Less downtime
Special Properties Provided By
Thermally Sprayed Coatings:
Enhances Tribological (Wear Resistant)
Characteristics
Increases Corrosion Resistance
Boosts Heat & Oxidation Resistance
Alters Electrical Conductivity or
Resistivity
Make the material Abradable or Abrasive,
depending on the need
Apart from
coatings, we can provide coated
components, designed to your
specifications or prints. Please contact
us for more information.
Click Here to Download our Product
Catalogue for Ceramic Coatings
(PDF Format) |
