Biaxial drawing test piece for testing strength of thermal barrier coating

A biaxial stretching, thermal barrier coating technology, applied in measuring devices, instruments, mechanical devices, etc., can solve the problem of inability to simulate the complex stress state of the coating system, and achieve the effect of uniform stress distribution

Inactive Publication Date: 2013-02-13
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In traditional strength tests, uniaxial tensile test specimens or three-point/four-point bending test specimens are mostly used,

Method used

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  • Biaxial drawing test piece for testing strength of thermal barrier coating
  • Biaxial drawing test piece for testing strength of thermal barrier coating

Examples

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Example Embodiment

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] like figure 1 and figure 2 As shown, a biaxial tensile test piece of the present invention for testing the strength of a thermal barrier coating comprises a metal tensile base 1 and a base surface coating 3 sprayed on the surface of the metal tensile base 1, the metal tensile base 1 A sample designed to have biaxial tensile properties, the specific shape is: in two orthogonal directions, there are clamping handles 1-1 that can be clamped by the biaxial tensile machine, and the clamping handle 1-1 is compatible with the The main part of the part has a smooth transition area 1-2, the transition area 1-2 of the present embodiment is a circular arc, and four symmetrical circular holes 2 are opened in the middle of the metal tensile base 1; the base surface coating 3 takes the center position of the test piece as the axis of symm...

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Abstract

The invention discloses a biaxial drawing test piece for testing the strength of a thermal barrier coating. The biaxial drawing test piece comprises a metal drawing substrate and a substrate surface coating which is painted on the surface of the metal drawing substrate, wherein the metal drawing substrate is designed into a test specimen with biaxial drawing characteristics and is provided with a clamping handle which can be clamped by a biaxial drawing machine in two orthogonal directions; the clamping handle and a main body of the test piece are provided with a smooth transition area; four symmetrical round holes are formed in the middle of the metal drawing substrate; and the center of the test piece serves as a symmetry axis of the substrate surface coating, and the substrate surface coating is symmetrically distributed in the area among the four symmetrical round holes. By the design of the biaxial drawing test piece, the state of complex strain which is born by a coating system in a service environment can be effectively simulated, and the foundation is provided for fully and accurately acquiring strength parameters of the coating system.

Description

technical field [0001] The invention relates to the technical field of testing the strength of a thermal barrier coating material, in particular to a biaxial tensile test piece for testing the strength of a thermal barrier coating. Background technique [0002] Thermal barrier coating technology is a very important thermal protection technology. It is mainly sprayed on the surface of metal substrates, which has a good thermal insulation and protection effect on metal substrates. It has a wide range of applications on hot end parts of gas turbines and aero-engines. application. The use of thermal barrier coating technology can significantly reduce the service temperature of the metal substrate, enabling the hot end components to operate at a gas temperature higher than its melting point, which is of great practical significance for improving gas efficiency and saving energy. Due to the complex multi-layer structure of the system and the brutal high-temperature service enviro...

Claims

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Application Information

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IPC IPC(8): G01N19/04
Inventor 王铁军苏罗川张伟旭李建果闫渊
Owner XI AN JIAOTONG UNIV
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