9cyy9f5f

3. Surface modification processes: ion beam surface treatment;
sol-gel coating technology; laser surface alloying. Coating for
corrosion resistance: conversion coatings; compound coatings -
diamond-like nanocomposites, nitrides, silicides, and carbides.
Coating for wear resistance: carbon nitride thin films; sputter
deposited nanostructured ceramic coatings; dielectric coatings
of Si-C alloy films. Electroless coating
Unit IV: Advance Surface Modification Techniques

4. Unit IV: Advance Surface Modification Techniques
Ion beam surface treatment
Thermal Process
Doesn’t change composition of workpiece
Ion Pulse creates rapid heating
Thin surface layer to melt
3x1013 ions per pulse
Cost for IBEST
aerospace, automotive, medical, and tool and die
healing of microcracks, improved hardness, improved corrosion and wear
resistance, smoother surface finishes, more refined grain structures, and
extended service life

5. Unit IV: Advance Surface Modification Techniques
Sol Gel Coating Technology

6. Sol Gel Creation
Indium tin oxide

7. Laser Surface Alloying

8. Laser Surface Alloying
Laser surface alloying: (a) schematic of process, and (b) crosssectional SEM back-scatter micrograph
showing the TiC composite coating (brighter contrast) on aluminum (darker grey contrast).
titanium carbide