JPS62228134A - Ultra-microhardness test method - Google Patents

Abstract

PURPOSE:To enable the testing of a material easy to deform, by adhering the specimen of a magnetic tape or a rubber material to a specimen stand by an adhesive and, after the solidification of the adhesive, pushing an indenter in said specimen. CONSTITUTION:A specimen 2 is fixed onto a specimen stand 5 formed by applying mirror surface finish to a glass plate or a thin steel plate by an adhesive 3 and an indenter 1 is subsequently pushed in the specimen 5. That is, the adhesive 3 is applied to the surface of the specimen stand 5 or the back surface of the specimen 2 to adhere the specimen 2 to the specimen stand 5 and solidified to fix the specimen 2 before the indenter 1 is allowed to fall to be pushed in the specimen 2. In this case, the relation of load-push-in depth is shown by a drawing and escape due to an air layer experienced heretofore is eliminated and accurate measurement is performed. By this method, the testing of a material easy to deform such as a rubber material which has been impossible to measure heretofore can be performed.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to an ultra-microhardness testing method.

[Prior art] The hardness of ultra-thin materials such as magnetic tape and materials such as rubber is measured using an ultra-micro hardness meter that measures the hardness of thin films such as metal evaporated films on the surface of test objects and insulating films on semiconductor substrates. It is carried out using

[Problems to be Solved by the Invention] However, when testing magnetic tape, rubber, etc. using an ultra-microhardness tester, as shown in FIG. There was a problem in that gaps (air layers) 9 were likely to occur, and these gaps caused measurement errors. In other words, if such a gap 9 exists, during the indentation process with the indenter, the indentation depth of the indenter will rapidly increase until the gap 9 disappears, as shown in Figure 5, so it is difficult to measure the load and the indentation depth. This results in large measurement errors in the targeted tests. In addition, as shown in FIG. 5A, in the case of a easily deformable sample such as the rubber 10, when the indenter is pushed in, the indenter escapes laterally due to its elasticity, and in some cases, there is a problem in that it becomes impossible to measure at all.

Therefore, an object of the present invention is to provide an ultra-microhardness testing method that enables accurate measurement of samples such as these magnetic tapes using an ultra-micro hardness meter.

[Means for Solving the Problems] In order to solve the above problems, the present invention employs the following configuration.

That is, the ultra-microhardness testing method according to the present invention involves attaching a sample such as a magnetic tape or a rubber material onto a sample stage using an adhesive, and after solidifying the adhesive, indentation is performed using an indenter. The characteristics are as follows.

[Operation] The indenter is pressed in after the adhesive has solidified and the sample is fixed on the sample stand, so there is no air space between the sample and the sample stand, and the sample does not escape in the lateral direction. will not occur.

[Example] Fig. 1 is a diagram illustrating a hardness test carried out by implementing the present invention, in which a sample 2 is fixed with an adhesive 3 on a sample table 5 made of a glass plate or a thin steel plate with a mirror finish. The indenter 1 is pressed in from. That is, as shown in FIG. 2, the adhesive 3 is applied to the front surface of the sample stage 5 or the back surface of the sample 2 (FIG. 2(A)), and the sample 2 is attached onto the sample stage 5, and the adhesive 3 is solidified. Wait until sample 2 is fixed (see figure (b)), then lower indenter 1 and perform indentation (see figure (b)).
Ha)).

FIG. 3 is a diagram showing the load-indentation depth characteristics obtained by implementing the present invention, and shows that accurate measurements are performed without escape due to air layers etc. as in the conventional case.

It is necessary to use an adhesive that has a hardness that can withstand the ultra-microhardness test load pressure when solidified, such as Aron Alpha or Brit (both trade names).

[Effects of the Invention] As is clear from the above description, according to the ultra-microhardness testing method of the present invention, it is possible to test easily deformable samples such as rubber materials, which were previously impossible to measure. ,
It has become possible to more accurately test ultra-thin materials such as magnetic tape.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating an ultra-microhardness test conducted by implementing the present invention, and FIGS. 2 (a), (b), and (c) are diagrams showing the procedure for implementing the present invention. Figure 3 is a diagram showing the load-indentation depth characteristics obtained by implementing the present invention, and Figures 4 (a) and (b).
) is a diagram explaining the drawbacks of the conventional method, and FIG. 5 is a diagram showing the load-indentation depth characteristics according to the conventional method.

Claims (1)

[Claims] (1) An ultra-microhardness testing method characterized by attaching a sample such as magnetic tape or rubber material onto a sample stage using an adhesive, and after solidifying the adhesive, indentation is performed using an indenter.