Cold-hot stage type high-speed calorimeter capable of being combined with other microstructure characterization techniques

Abstract

The invention discloses a cold-hot stage type high-speed calorimeter capable of being combined with other microstructure characterization techniques, and relates to the phase and microstructure analysis device technology field. The cold-hot stage type high-speed calorimeter includes a sample chamber having a light transmission transparent window and a light reflection transparent window on the wall, a cold-hot stage having the interior including a heating element and a refrigerant circulation pipeline for controlling the temperature and having a transmission hole, a sample chamber temperature control system and a high-speed calorimetric system. The cold-hot stage type high-speed calorimeter has the advantages that: 1, the high-speed calorimetric system having the temperature rising / dropping rate is miniaturized to the cold-hot stage, and with utilization of the reflection window, the transmission window and the cold-hot stage transmission hole, on-site combination of calorimetry and microstructure characterization are carried out; and 2, response is rapid through programmable control, sample temperature disturbance caused by incident light in structure measurement is dynamically compensated, the sample temperature is stabilized, thereby being conveniently used for researches on a metastable state.

Description

technical field [0001] The invention relates to the technical field of phase and microstructure analysis equipment, in particular to a cold and hot table type high-speed calorimeter that can be used in combination with other microstructure characterization techniques to realize high-speed heat treatment of samples and at the same time Analytical equipment for in situ characterization of structures. Background technique [0002] Metastable or evanescent materials usually have strange physical and chemical properties, and many materials with excellent performance are in a special metastable state. For example, during the processing of steel, it is transformed from austenite to metastable martensite by quenching, thereby greatly improving its performance. The structure and properties of metastable materials have always been one of the hotspots of people's research, and the research fields involve many scientific fields such as materials science, physics, chemistry, biology, en...

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Problems solved by technology

2. Since the additional heat capacity of the sample and the sensor used in the high-speed calorimeter is very small, even low-power incident light irradiation will have a great impact on the sample temperature

However, the existing FSC uses power compensation to control the temperature of the sample. When the impact of the incident light used for structural characterization on the sample temperature exceeds the power compensation limit, the sample temperature will be out of control, which may lead to changes in the sample structure.

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