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首页> 外文期刊>Journal of Materials Research >Subsurface cracking during indentation on hybrid coatings on polycarbonate
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Subsurface cracking during indentation on hybrid coatings on polycarbonate

机译：聚碳酸酯杂化涂层压痕过程中的亚表面开裂

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摘要

Subsurface cracking after nano- and Vickers indentation on transparent silica―(meth)acrylate hybrid coatings deposited on a polycarbonate substrate was observed for the first time. It appeared that after initiation at the interface, these cracks propagated toward the surface and in radial directions as the indentation load increased. It was found that, for chemically identical coatings, the thicker the coating, the higher load necessary to initiate these cracks. Subsurface cracks formed during nanoindentation occur at lower loads than the normally observed surface cracks and are accompanied by a very small change in the slope of the loading curve.
机译：首次观察到在聚碳酸酯基底上沉积的透明二氧化硅-（甲基）丙烯酸酯杂化涂层上的纳米和维氏压痕后的亚表面开裂。似乎在界面处引发之后，随着压痕载荷的增加，这些裂纹向表面并沿径向传播。已经发现，对于化学上相同的涂层，涂层越厚，引发这些裂纹所需的载荷就越高。纳米压痕过程中形成的亚表面裂纹的载荷低于正常观察到的表面裂纹，并且载荷曲线的斜率变化很小。

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