SU1232995A1 - Arrangement for high-temperature mechanical testing of specimen - Google Patents

Abstract

The invention relates to a test technique and can be used in high temperature tests. The purpose of the invention is to increase the reliability and quality of the tests by ensuring that the metal constituents of the sample are deposited during their evaporation during the heating process. Sample 5 is installed in the grips 4 and the reactive gas is fed into chamber 1. After the rings 11 are made of porous refractory metal with gas, sample 5 is heated through the current leads 6 to a predetermined temperature. A power supply 15 is turned on and an increased voltage is applied to the electrodes 8. Under the influence of temperature and voltage, the reactive gas is removed from the rings 11 and is ionized. In the gaps 9 between the electrodes 8, a non-self-sustaining discharge is formed in the vapors released from the sample 5 as a result of the heating of the metal components and the reactive gas. Under the action of an electric field, metal components are deposited on the screen 12, after which the power supply 15 is turned off and the sample 5 is mechanically tested. f-ly, 1 ill. /) u: o y: o

Description

I

The invention relates to testing equipment, namely, devices for high-temperature mechanical testing of samples.

The purpose of the invention is to increase the reliability and quality of the tests by ensuring that the metal constituents of the sample are deposited during their evaporation during the heating process.

The drawing shows a diagram of the proposed device.

The device comprises a sealed chamber 1 with a viewing window 2 and a vacuum inlet 3 communicated with a vacuum system (not shown). In chamber 1, clamps 4 for fastening test sample 5 and current leads 6 for heating are placed, connected to grips 4 by flexible tires 7. Concentric axes of grips 4 are installed coaxially with each other by coded gaps 9, with electrodes 8 st The electrical circuits 10 are interconnected. In the gaps 9 between the electrodes 8, electrically insulating rings 11 made of porous refractory metal are installed, representing a collector of reactive gas. Kame12

Step 1 is in communication with the appropriate TU-30 source, and sample 5 is heated to a noon (not shown) reactive gas.

The collector rings 11 and the ionization electrodes 8 are covered by an electrically insulated cylindrical screen 12 connected with an electrical circuit 13 to the collector rings 11. Through electrical circuit 14, screen 12 is connected to the negative pole of power supply 15, electrodes 8 are connected to the positive pole of electrical circuit 10. In screen 12, a hole 16 is made coaxially with the viewing window 2, in which the heating temperature monitoring device of sample 5 is placed in the form of an optical photopyrometer (not shown).

The device works as follows.

In grips 4, sample 5 is fixed and gas is fed from the source of reactive gas into chamber 1. In this case, pr, is the saturation of the reactive gas collector. Then, the evacuation system is turned on and, after creating a specified vacuum in the chamber 1

ten

232995i

heating sample 5 to a predetermined temperature, which is controlled by an optical photopyrometer installed in the opening 16 of the screen 12. Heating is carried out by passing electric current through the current leads 6 and flexible tires 7. At the same time, due to radiation from sample 5, the rings 11 of the active gas collector are heated and ionization electrodes 8. A power supply 15 is turned on and ionization electrodes 8 are fed up. power supply voltage. As a result, reactive gas is released from the collector rings 11, which, under the influence of increased voltage and temperature, is ionized. In the gaps 9 between the ionization electrodes 8, a non-self-sustaining discharge occurs in the vapors separated from the sample 5 as a result of the heating of the metal components and the reactive gas. Under the action of an electric field, metal components evaporating during heating of the sample 5 are deposited on the screen 12, which is connected to the negative pole of the power supply 15. After the evaporation of the metal constituents of sample 5, the source 15 is disconnected.

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set temperature and carried out its mechanical tests.

1 formula of invention

one . A device for high-temperature mechanical testing of samples containing a sealed chamber with a comb window, grippers placed in the chamber for fastening the test sample with 1 current leads for heating it, a chamber evacuation system and means of controlling the sample temperature, in order to increase the reliability and quality of tests by providing the deposition of the metal components of the sample during their evaporation during the heating process, it is provided with electrically interconnected ring electrodes they are installed coaxially with each other with gaps between them and the concentric axis of the grippers, the collector of reactive gas in the form of electrically insulated rings of porous refractory metal installed between the electrodes, covering the call: Electrode and electrodes 3 12329954

an insulated cylindrical screen; 2. The device according to claim 1, of tl and a nom, electrically connected to the ring — that in the screen

the collector, and the power source, coaxially with the viewing window, the chamber was pushed out of the positive pole of which there was a hole

electrodes are connected, and to the negative - placement of control means in it

nomu - screen. sample temperature.

Claims (2)

Claim 1.. A device for high-temperature mechanical testing of samples containing a sealed chamber with a viewing window, placed in the chamber 40 grips for mounting the test sample with t current leads for heating it, a chamber vacuum system and means for controlling the temperature of the sample, characterized in 43 that, to improve the reliability and quality of test by providing the deposition of metallic components of the sample at its evaporation during the heating process, it is provided with electrically 5Q interconnected annular electrodes ionization mounted coaxially to each other with clearances between the control _of them and concentric gripper axis, collector reactive gas in the form of electrically insulated rings of porous refractory metal mounted between electrodes covering the collector and electrodes electro 1232995 3 · an insulated cylindrical screen, electrically connected to the rings of the collector, and a power source, to the positive pole of which electrodes are connected, and to the negative pole - the screen. 2. The device according to claim 1, characterized in that a hole is made in the screen, coaxial to the viewing window of the camera, designed to 5 place means for controlling the temperature of the sample in it. Compiled by M. Matyushin Editor V. Ivanova Tehred V. Kadar Corrector I. Muska Order 2760/43 Circulation 778 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya Iab., D. 4/5 Production and printing company, Uzhhorod, st. Project, 4.