Preparation method of porous medium standard test piece

A technology of porous media and standard test pieces, applied in the direction of suspension and porous material analysis, measuring devices, instruments, etc., to achieve the effect of good low temperature toughness, broad application prospects, and attention to preservation and maintenance

Inactive Publication Date: 2011-02-02
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing ideas and technologies have not yet produced this kind of porous media standard test piece, and it is necessary to propose a solution to this demand and problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of porous medium standard test piece, its concrete steps are:

[0026] (a) Select the appropriate basic raw material powder and the particle size distribution of the powder to effectively fill the intergranular pores; the particle size of the selected basic raw material powder is -100 mesh at most, and the minimum is -200 mesh. Use AISI316L stainless steel alloy powder. If the permeability of the porous medium standard test piece is on the order of μD, the selected powder particle size is about -200 mesh; if the permeability of the porous medium standard test piece is on the order of mD, the selected powder particle size is about -150 mesh; If the permeability of the porous medium standard test piece is on the order of D, the selected powder particle size is about -100 mesh. In order to effectively fill the pores between the powder particles, so that the best density can be obtained during the pressing process.

[0027] (b) After washing a...

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PUM

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Abstract

The invention discloses a preparation method of a porous medium standard test piece, comprising the steps of (a) selecting raw material powder and the granularity grade; (b) cleaning and drying the selected raw material powder, and then adding additive powder for mixing to perform mechanical ball milling; (c) putting the mixed powder in a rigid mold for pressing to form a cylinder; (d) taking outthe blank from the mold to obtain green compact; (e) repeating the steps (c) and (d) to prepare the green compact; (f) conveying the green compact to a vacuum sintering furnace for sintering to obtaina porous element product; (g) processing the porous element product to form the porous medium standard test pieces; (h) cleaning, sterilizing and drying the porous medium standard test pieces; (i) performing a permeability test on the porous medium standard test pieces, and selecting the test pieces with consistent parameters; and (j) immersing the obtained porous medium standard test pieces in an alcoholic solution for storage. The porous medium standard test piece of the invention is detected by penetration for a long time and detected in all penetration conditions, has constant penetrationparameters, is reliable, and provides high-efficiency evidence and method for calibration of permeability tests.

Description

technical field [0001] The invention relates to the technical field of porous media materials, and more specifically relates to a preparation method of a porous media standard test piece. The prepared porous medium standard specimen is suitable for calibrating the accuracy and range of the permeation experiment, and realizes industry standardization in the field of permeation measurement technology. Background technique [0002] Porous media materials widely exist in nature and human society, such as natural rock materials, artificial marble materials, etc. The early porous media materials were directly blasted or drilled from nature, and then machined into the required shape and size. Later, with the development of stone processing technology, many artificial porous media stone materials appeared. However, these natural or artificial porous media materials have more or less problems and defects such as particle dissolution, pore deformation, material expansion and contract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N13/04
Inventor 王颖李小春魏宁
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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