A sample fixture device for gradient thermal shock test of thermal barrier coating
A technology of sample fixture and thermal barrier coating, which is applied in measurement devices, strength characteristics, instruments, etc., can solve the problems affecting the crack propagation mode and the accuracy of thermal barrier coating, etc., and achieves improved efficiency, convenient installation, fixtures simple structure
Active Publication Date: 2017-11-24
HUANENG POWER INT INC +1
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Problems solved by technology
The change of the stress state on the surface of the sample will inevitably affect the crack propagation mode during the thermal shock process, thus affecting the accuracy of the life prediction of the thermal barrier coating
Method used
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Embodiment Construction
[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] Such as figure 1 As shown, the installation and use process of the fixture of the present invention is: the bottom circular steel plate 1 is placed on the bottom, the middle ring 2 is placed on the bottom circular steel plate 1, the bottom edge through hole 1-2 on the bottom circular steel plate 1 and The middle edge through hole 2-1 on the middle ring 2 is aligned, put the circular gradient thermal shock sample between the middle trapezoidal gripper 2-2 on the middle ring 2, face up, circular gradient thermal shock The edge of the sample is in close contact with the 2-2 arc edge of the middle trapezoidal gripper. After the sample is loaded, the top ring 3 is placed on it, and the top edge through hole 3-1 on the top ring 3 is aligned with the middle edge through hole 2-1 on the middle ring 2. Bottom circular steel plate 1, m...
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A thermal barrier coating gradient thermal shock test sample fixture device, including the bottom circular steel plate, the middle ring and the top ring that are stacked and used in sequence; before the test, the bottom circular steel plate is placed on the bottom, Put the middle ring on it, and then put the sample into the trapezoidal gripper of the middle ring, and finally put the top ring on it, adjust the three parts to align the round holes on them, and connect them through bolts and nuts Fasten, and the sample assembly is completed; the feature of the invention is that the fixture structure is simple, easy to install, and improves efficiency; the fixture does not affect the stress state of the sample surface during the thermal shock test, and can truly simulate the surface state of the workpiece covered with thermal barrier coating during work; It can meet the conditions of sample surface heating and back cooling, and simulate the real service conditions of thermal barrier coatings.
Description
technical field [0001] The invention belongs to a thermal barrier coating service environment simulation device, in particular to a thermal barrier coating gradient thermal shock test sample fixture device. Background technique [0002] With the development of aviation, aerospace and civil technology, the temperature requirements of hot end components are getting higher and higher, which has reached the limit of superalloys and single crystal materials. Take the heated parts of gas turbines such as nozzles, blades, and combustion chambers as examples. They are in harsh environments such as high-temperature oxidation and high-temperature airflow erosion, and they can withstand temperatures as high as 1100 ° C, which has exceeded the limit temperature (1075 ° C) used by high-temperature nickel alloys. The thermal barrier coating prepared by combining the high strength and toughness of metal with the high temperature resistance of ceramics can solve the above problems. It can p...
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IPC IPC(8): G01N3/04G01N3/60
Inventor 李勇杨二娟李太江李巍刘刚杨兰
Owner HUANENG POWER INT INC