Hard coating hardness measuring method

A measurement method and technology of hard coating, applied in the field of coating measurement, measurement of hardness of hard coating, can solve the problem of not finding the same or similar literature reports and so on

Inactive Publication Date: 2003-06-11
SHANGHAI JIAO TONG UNIV
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[0008] Using the micro-mechanical probe technology, the first step of indentation testing of the coating / matrix composite with a large enough load is carried out. The first step of indentation is carried out with a load sufficient to expand the deformation zone at the front end of the indenter to the substrate, so as to ensure that the test This is confirmed by the decrease in hardness of the coating / substrate composite at high indentation loads. Record the relationship between the indentation load and the depth of the indenter indented into the coating during the indentation process, and then calculate the hardness of the coating / substrate composite under the loaded condition through the change of the indentation depth. Given the loading curve of the indentation load and indentation depth, the change curve of the hardness of the coating / substrate composite with the indentation load is calculated, and the hardness of the coating / substrate composite with the indentation load is ...

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Abstract

First, the technique of the tiny mechanics probe is adopted to carry out the first step of the indentation detecting of the composite body of the coating layer/basal body. In the indentation detecting, the load is applied to the indenter, making the deformation zone in front of the indenter expand to the basal body. The varying relation between the indentation load and the indentation depth is recorded. Based on the change of the indentation depth, the hardness of the compoiste body of the coating layer/basal body under the loaded condition is calculated out. Further, the varying curve between the hardness and the indentation load is made. The second step of the indentation detecting is carried out under the coating layer without the influence of the deformation of the basal body. The invention possesses the features of the accuracy and reliable.

Description

technical field [0001] The invention relates to a method for measuring a coating, in particular to a method for measuring the hardness of a hard coating, and belongs to the field of material performance testing. technical background [0002] In the prior art, coating hard ceramic coatings on metal materials and cemented carbide tools can improve the processing quality and service life of the tools and tools, thus being widely used in the machining industry. In the quality evaluation of hard coatings, it is of great significance to accurately measure the hardness of the coating. However, due to the characteristics of high hardness (greater than 15GPa) and thin thickness (1μm-10μm) of the hard coating The measurement is very difficult, and the difficulty is mainly reflected in the selection of the indentation load of the hardness test: too small indentation load will cause the obtained data to be very scattered due to the surface roughness of the sample and the disturbance of ...

Claims

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Application Information

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IPC IPC(8): G01N3/40
Inventor 李戈扬戴嘉维张惠娟顾明元
Owner SHANGHAI JIAO TONG UNIV
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