Testing method for softness of porous metal materials

Abstract

The invention provides a method for detecting the flexibility of a porous metal material. The method comprises the following steps: putting the porous metal material with a certain size on the plane of a platform with a certain height L1 to ensure that the porous metal material is put outside the plane of the platform by a certain length and suspended in the air, wherein the porous metal material put outside the plane of the platform is a sample to be detected; putting a gravity source with a certain weight at a position which has a certain distance A3 from the tail end, outside the plane of the platform, of the sample to be detected, standing for 15-30s, measuring the height L2 from the tail, outside the plane of the platform, of the naturally curved sample to be detected to the bottom of the plane of the platform, and calculating according to a formula D=(L1-L2) / (s*rho) to obtain the numerical value of the flexibility, wherein the D refers to the flexibility, the S refers to the area of the sample to be detected and the rho refers to areal density of the porous metal material. The method provided by the invention is simple to operate used equipment is simple, and detection cost is low; the actual flexibility of the porous metal material can be directly, rapidly and effectively reflected in production field; the production is well guided; the reject ratio of the production is reduced.

Description

technical field [0001] The invention relates to a method for detecting softness, in particular to a method for detecting softness of porous metal materials. Background technique [0002] Nickel foam, the core skeleton material of nickel-metal hydride batteries, is a typical porous metal material, and its softness is one of the important indicators affecting battery performance. For a long time, because of the porous characteristics of nickel foam itself, there has not been a fast, simple, and low-cost method and equipment for characterizing the softness index of nickel foam in production, and it cannot guide the production of nickel foam in time. The indicators cannot be truly and effectively guaranteed, so the manufacturing process of the battery cannot be effectively improved. [0003] Other porous metal materials, such as copper foam, nickel-iron foam, etc., also have the problem that the softness cannot be effectively detected when they are used in the fields of catalys...

AI Technical Summary

Problems solved by technology

For a long time, because of the porous characteristics of nickel foam itself, there has not been a fast, simple, and low-cost method and equipment for characterizing the softness index of nickel foam in production, and it cannot guide the production of nickel foam in time. The indicators cannot be truly and effectively guaranteed, so it is impossible to effectively improve the battery manufacturing process

[0003] Other porous metal materials, such as copper foam, nickel-iron foam, etc., also have the problem that the softness cannot be effectively detected when they are used in the fields of catalyst carriers and filter materials.