hardcoat

plural hardcoats

1. countableuncountableA coating that provides a hard, protective layer.

   Another transparent material for passivation is silicon nitride, Si₃N₄, that also acts as hardcoat.

   2012, Michael Quinten, A Practical Guide to Optical Metrology for Thin Films

   2 more examples

   Such brute-force tactics generally fail for hardcoats on flexible substrates and there seems to be no correlation between scratch resistance and modulus once a certain minimum modulus (~1 GPa) has been reached.

   2013, Steven Abbott, Nigel Holmes, Nanocoatings: Principles and Practice: From Research to Production, page 255

   Super Thin Glass: SAIC of McLean, Virginia, and NREL have been developing a front surface mirror concept with a hardcoat protective layer. The material uses an ion-beam-assisted deposition (IBAD) process to deposit the very hard (cleanable), dense (protective) alumina topcoat.

   2017, Yogi Goswami, Advances in Solar Energy, volume 16