| Plasma sprayed ceramic coatings |
| Chemically formed ceramic coatings |
| Low temperature process No dimensional distortion Can be done for all geometries and shapes Can coat inside cavities Grinding can be done with conventional wheels Coating is dense Coating cost is low |
| High temperature process involving a temperature of 5000 degree C Dimensional distortion takes place Can be done only on geometrically uniform products (like cylinders) Cannot coat inside cavities Grinding can be done only with expensive diamond wheels Coating is porous Coating cost is high |
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