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Microstructural, alloying, and architectural effects on the fracture toughness of hard CrN coatings
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DOI：10.1016/j.ijrmhm.2026.107926.png)
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Abstract
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• Bias- and temperature-induced microstructural changes weakly affect CrN KIC. • CeSi2 alloying increases hardness to 27.5 GPa and boosts KIC by ∼20%. • CrN–TiN superlattices raise hardness by ∼40% through interface strengthening. • Superlattice architecture enhances KIC by ∼50% via coherent lattice stresses. • Alloying and multilayers outperform pure microstructure tuning for KIC control.
Keywords:
Physical vapor deposition
Hard coatings
Micromechanical experiments
Microcantilever bending test
Fracture toughness
Superlattice
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