Coating film brittle fracture method

The invention relates to a simple and rapid sample brittle fracture preparation method for observing the microscopic morphology of the section of a polymer film, a pole piece and other materials which are soft, high in toughness and not prone to brittle fracture at low temperature. The method has the advantages that common equipment in a conventional material characterization laboratory is adopted, a film is plated on the surface of the material through ion sputtering, and rapid brittle failure is performed in a liquid nitrogen low-temperature environment, so that section preparation of a high polymer material can be realized rapidly, simply and conveniently in a high-quality manner, and section microscopic high-resolution morphology observation of related materials is well supported; the method shows practical application value in scientific research work, and is suitable for preparation of related samples of a conventional material characterization laboratory. 本发明涉及一种针对柔软、韧性高、低温不易脆断的高分子薄膜、极片等材料的断面显微形貌观察提供简便