Fracture properties of thin brittle MTM clay coating on ductile HEC polymer substrate
نویسندگان
چکیده
Thin clay coatings can be deposited from water dispersions for the purpose of improved gas barrier properties and fire retardancy polymeric materials. Mechanical are difficult to assess, since they very thin (≈1µm). In-situ tests using a micro tensile stage in scanning electron microscope reveal thickness-dependent microcracking mechanism, Weibull parameters coating fracture extracted. Complex events identified, related weak coating-polymer substrate interface. A micromechanical finite element formulation provides values 5 MPa interfacial shear strength 1 J/m2 toughness. From multiple cracking behavior coating, ≈ 225 is estimated by parameter fragmentation diagrams. The method may extended other combinations brittle coating-ductile substrates.
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ژورنال
عنوان ژورنال: Materials & Design
سال: 2023
ISSN: ['1873-4197', '0264-1275']
DOI: https://doi.org/10.1016/j.matdes.2023.111947