METHOD AND APPARATUS FOR THERMAL RESEARCH MATERIAL

摘要

1. A process for investigation of thermal diffusivity of the material comprising the sample with electrical adjustment in vacuo and recording the current temperature values ​​at the control points for the subsequent calculation of thermophysical properties of the material, characterized in that the sample prepared for the study is subjected to thermal and mechanical stress, for example an axial mechanical uniaxial stretching, and / or angular deviation of the temperature gradient vector from the vector of the gravitational acceleration, coinciding with the gravity vector, register the temperature along the length of the sample over time and the resulting data are used to determine the dynamic thermal characteristics of the material such as rate of temperature change, the propagation velocity of the heat fronta.2. Test method diffusivity material according to claim 1 characterized in that in the preparation of the specimen in the form of a thermally insulated wire of the test material and a length of at least 100 its diameter, is wound in the middle part of the electric heater, a thermocouple is welded at the control points, wherein at least one thermocouple - below the heater and the thermocouple on the edges, wherein the last distance until the same heater prepared sample is placed in a chamber with one end of specimen is fixed in its stationary and the other - is attached to the movable rod, then vakuumiriruyut chamber, the sample was loaded predetermined tensile load by moving the traction and / or specify the angular deviation of the temperature gradient vector of the gravitational acceleration g rotating chamber VC