Method for testing elasticity moduli of coatings

Abstract

The invention provides a method for testing elasticity moduli of coatings. Coatings are deposited on surfaces of matrix samples and are boned with dual samples by using high-strength glue; load displacement curves of boned samples are tested by using a tensile testing machine; and the curves are compared with a tensile testing result of a sample formed by bonding two matrix samples with deposition layers, so that elasticity modulus values perpendicular to the surface directions of the coatings during tensile processes of the coatings are obtained. The method makes up various disadvantages of a conventional surface coating testing technology. The advantages are as follows: a bending method can only be used for testing coating elasticity moduli parallel to the surface directions; and an indentation method is only can be used for testing local mechanical properties of the coatings and complexity of an ultrasonic testing method. The technical requirement for testing the elasticity moduli perpendicular to the surface directions of the coatings conveniently and reliably can be met. The method is applicable to measurement of indexes of elasticity moduli perpendicular to the surface directions of various surface coatings.

Description

technical field [0001] A method for testing the elastic modulus of a coating provided by the invention belongs to the technical field of testing the mechanical properties of the surface coating of parts, is suitable for testing the axial elastic modulus of various surface coatings, and can be widely used in the field of surface technology engineering . Background technique [0002] Wear and corrosion are the main forms of damage to various mechanical and engineering components, resulting in enormous economic losses. As we all know, wear and corrosion are due to the gradual loss of surface materials during the service process, resulting in the failure of its size and performance to meet the design requirements and eventually failure. In order to effectively solve the above problems, surface engineering technology emerged as the times require, and was listed by the U.S. Department of Commerce as one of the seven key technologies affecting human life in the 21st century. Toda...

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Problems solved by technology

[0005] In order to solve various limitations in the current surface coating testing technology, for example, the bending method can only test the elastic modulus of the coating parallel to the surface direction, the indentation method can only test the local mechanical properties of the coating, and the ultrasonic testing method is cumbersome and complicated, which cannot meet Conveniently and reliably test the technical requirements of the elastic modulus of the coating perpendicular to the surface, the present invention provides a method for testing the elastic modulus of the coating perpendicular to the surface, the purpose of which is to deposit the coating on the surface of the substrate sample And cemented with the dual sample, the tensile stress-strain curve of the sample is tested by a universal testing machine, and the elastic modulus of the coating during the stretching process is obtained by comparing the tensile test results of the comparative sample without depositing the coating value

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