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Preparation device for clamping end of tensile specimen of silicon carbide ceramic cladding tube

A technology of silicon carbide ceramics and tensile specimens, which is applied in the preparation of test samples, etc., can solve the problems of inability to guarantee the clamping end, performance error, easy clamping of the clamping end, etc., and achieve the effect of reducing damage.

Active Publication Date: 2020-09-04
核工业第八研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wall of the ceramic cladding tube is very thin and has great brittleness. The general hard fixture is very easy to clamp the clamping end, and it cannot guarantee that the clamping end is concentric with the pipe, and there is a large error in the performance of the test. , and it is easy to cause damage to pipe fittings due to stress concentration

Method used

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  • Preparation device for clamping end of tensile specimen of silicon carbide ceramic cladding tube
  • Preparation device for clamping end of tensile specimen of silicon carbide ceramic cladding tube

Examples

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Effect test

Embodiment

[0025] A device for preparing the clamping end of a tensile sample of a silicon carbide ceramic cladding tube, the structure of which is as follows: figure 1 As shown, it consists of a base 5, an inner lining 4 and an upper cover 2. A through hole is provided in the middle of the base 5. The cross-sectional shape of the through hole is a conical trapezoid, and the conical inclined surface is integrally processed as a matching base.

[0026] The design profile of lining 4 is conical trapezoidal, and outer diameter taper matches with base internal diameter taper, and size makes lining can be put into base 5 internal frustum-shaped grooves, and the center of lining 4 is positioned at the center of conical trapezoid. The center of the lining 4 is a vertical cylindrical groove, and the cylindrical wall is parallel to the central line of the conical trapezoid. The liner can be made of polytetrafluoroethylene or other metal materials.

[0027] The closing loam cake 2 is also conical...

Embodiment 2

[0032] This embodiment is a specific process step for making a preparation device for clamping the end of a tensile sample of a silicon carbide ceramic cladding tube:

[0033] Step 1: Take a 100mm*100mm*80mm square carbon steel block, and process a conical trapezoidal slope at an angle of 80° at its inner center, with a maximum diameter of 80mm. A cylindrical hole with a diameter of 56mm is processed at the bottom, and the conical trapezoid is connected to take out the lining. The hypotenuse of the conical trapezoid serves as a positioning datum slope.

[0034] Step 2: Take a PTFE cylinder with an outer diameter of 66mm and a height of 30mm, process it into a conical trapezoid at an angle of 80°, and process a cylindrical hole with a depth of 25mm and a diameter of 15mm at the center of the long side of the conical trapezoid. Used as a lining.

[0035] Step 3: Take a cylindrical carbon steel with a diameter of 85mm and a height of 35mm, and process it into a conical trapezoi...

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Abstract

The invention relates to a preparation device of silicon carbide ceramic cladding tube tensile specimen clamping ends. The device consists of a pedestal, a lining and a combined upper cover. The middle of the pedestal is equipped with a through-hole, the lining and the combined upper cover are arranged in the through-hole disposed in the pedestal, and the pedestal, the lining and the combined upper cover are in concentric arrangement. Compared with the prior art, the ceramic tube specimen's two clamping ends prepared by the device provided by the invention coincide with the central axis of theceramic tube, the sample validity is high, and the ceramic tube performance can be reflected more truly.

Description

technical field [0001] The invention relates to the field of material testing, in particular to a device for preparing a clamping end of a tensile sample of a silicon carbide ceramic cladding tube. Background technique [0002] Silicon carbide fiber-reinforced ceramic matrix composites are used in high temperature conditions due to their high strength, high hardness, good wear resistance, good thermal shock resistance, high thermal conductivity, strong oxidation resistance and chemical corrosion resistance. It has already been applied in the field of nuclear power. [0003] In the field of nuclear power, silicon carbide ceramic composites are mainly used to prepare nuclear fuel cladding tubes. The cladding tube is subjected to various forces during use, and the tensile property is the most basic test parameter for the mechanical properties of the ceramic cladding tube, and it is one of the must-test parameters for the cladding tube. [0004] At present, the axial tensile t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 谢宇辉高建军陆宏光
Owner 核工业第八研究所