CN103592329B - A kind of method of testing thermal barrier coating adiabatic temperature - Google Patents
A kind of method of testing thermal barrier coating adiabatic temperature Download PDFInfo
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- CN103592329B CN103592329B CN201310508093.4A CN201310508093A CN103592329B CN 103592329 B CN103592329 B CN 103592329B CN 201310508093 A CN201310508093 A CN 201310508093A CN 103592329 B CN103592329 B CN 103592329B
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Abstract
The invention discloses a kind of method of testing thermal barrier coating adiabatic temperature, comprise the steps: (1) having same matrix material coating sample and welding K type thermopair respectively without the back side of coating sample, then be fixed in two through holes of the adiabatic fire door that resistance furnace improves respectively, the back side of sample directly and atmosphere, towards burner hearth before sample; (2) adiabatic fire door is equipped with two S type thermopairs, the contact of every S type thermopair is close to the front center of a sample; (3) to resistance furnace electrified regulation, temperature signal is sent to digital temperature registering instrument by S type thermopair, when in-furnace temperature reaches 1100 DEG C, and after a period of stabilisation, stop heating, sample cools with stove, and the temperature data of moisture recorder is drawn temperature curve, then the effect of heat insulation Δ T of thermal barrier coating be exactly without coating sample back temperature and have the difference of back temperature of coating sample.
Description
Technical field
The present invention relates to a kind of measuring technique of thermal barrier coating heat-proof quality, be specifically related to a kind of measuring method of thermal barrier coating adiabatic temperature.
Background technology
At present, the method that thermal barrier coating temperature differential method surveys heat-proof quality has: flame flame stream method, specifically spray one deck coating at graphite or other matrix surface, oxyacetylene torch heated sample surface, by the temperature at thermocouple measurement sample surfaces and the back side, the difference of the temperature before and after sample is adiabatic temperature, the method shortcoming does not have comparative sample, and the heat time is short, sample surfaces and back temperature short for stabilization time, also easily be subject to the impact of surrounding environment, thermal barrier coating adiabatic temperature can not be tested preferably.
Summary of the invention
In order to represent the change of thermal barrier coating heat-proof quality quantitatively, exploring the Changing Pattern of heat-proof quality better, the object of this invention is to provide a kind of heat insulation curve of resistance furnace test sample that adopts to obtain the method for thermal barrier coating adiabatic temperature.
For reaching above object, the present invention takes following technical scheme to be achieved:
Test a method for thermal barrier coating adiabatic temperature, it is characterized in that, comprise the steps:
(1) having coating sample and welding K type thermopair respectively without the back side of coating sample by same matrix material, then be fixed in two through holes of the adiabatic fire door that resistance furnace improves respectively, the back side of sample directly and atmosphere, towards burner hearth before sample;
(2) adiabatic fire door is equipped with two S type thermopairs, the contact of every S type thermopair is close to the front center of a sample, is responsible for the surface temperature measuring sample; The temperature measuring the sample back side is responsible for by the K type thermopair of sample back side welding;
(3) to resistance furnace electrified regulation, temperature signal is sent to digital temperature registering instrument by S type thermopair, when in-furnace temperature reaches 1100 DEG C, and after a period of stabilisation, stop heating, sample cools with stove, and the temperature data of moisture recorder is drawn temperature curve, then the effect of heat insulation Δ T of thermal barrier coating be exactly without coating sample back temperature and have the difference of back temperature of coating sample.
In said method, the welding technology of described K type thermopair 7 is as follows:
A, by the oxyacetylene torch spray gun welding of NiCr-NiSi silk;
B, the NiCr-NiSi contact micro capacitance spot welding instrument after welding to be welded in after sample.
The described rate of heat addition is 20 DEG C/min.
Adiabatic fire door two through holes of described improvement, it is hydraucone towards the one end inside fire door, this hydraucone is positioned on the boss inside fire door, all ceramic embedded pipe in two through holes, sample is fixed on ceramic pipe end, near the hydraucone of through hole, described S type thermopair pierces into hydraucone from boss side.
Compared with existing flame flame stream method, advantage of the present invention is:
1, before sample, S type thermopair directly contacts sample center, and sample back side welding K type thermopair, can measure the temperature with the back side before sample really, can measure the adiabatic temperature of coating more accurately.
2, comparative sample is set, the adiabatic temperature of same matrix sample with or without thermal barrier coating can be obtained more accurately, and effect of heat insulation is more directly perceived.
3, due to use the method, time, coating is by the state heated, and therefore the method not only can measure original effect of heat insulation, also can measure coating after certain times of thermal cycle, the adiabatic temperature situation of change of coating.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
Fig. 1 is the structural drawing of the heat insulation fire door of resistance furnace involved in the present invention.
Fig. 2 is the heat insulation fire door cut-open view of Fig. 1.
In Fig. 1, Fig. 2: 1, fire door; 2, S type thermopair; 3, boss; 4, hydraucone; 5, sample; 6, ceramic pipe; 7, K type thermopair; 8, insulation material; 9, burner hearth.
Fig. 3 is the heat insulation curve of Supersonic Plasma Spraying thermal barrier coating of embodiment of the present invention sample.
Embodiment
As Fig. 1, shown in Fig. 2, experimental provision of the present invention is conventional resistance furnace (heating can adopt Elema or Si-Mo rod), have employed a kind of heat insulation fire door of improvement, comprise fire door 1, fire door insulation material 8 is fibrous silicate aluminium, inside fire door, (one side towards burner hearth 9) is provided with a boss 3, boss is cut a hole outside two through holes to fire door, by ceramic pipe 6 from inlaying in inlet hole outdoors, sample 5 is contained in ceramic pipe 6 end, also fixing near hydraucone 4 position of through hole, hydraucone before sample is provided with S type thermopair 2(and pierces into from boss 3 side), after sample, a K type thermopair 7 is welded in center.
Prepare two samples before experiment, matrix material is high conjunction 3030, diameter 30mm, thickness 3mm, carries out purified treatment with acetone to matrix, sample is put into the beaker filling acetone and carries out the clean 15min of ultrasound wave vibration, carry out surface degreasing.Then use the surface of one of them sample of suction sand-blasting machine process, carry out sandblasting (corundum sand), increase surfaceness to increase cohesive strength.This matrix sample handled well is fixed on spraying platform, adopts Supersonic Plasma Spraying equipment spraying ceramic coat.Only need clean oil removing without coating sample, after welding K type thermopair respectively after two samples, load in ceramic pipe 6, fix sample with ceramic push pipe, push pipe lock silk and spring (not shown in FIG.).Directly and atmosphere, wherein there is the coat side of coating sample at the sample back side towards burner hearth; Two S type thermopair (platinum-rhodium-platinum thermocouple) contacts are close to sample front center, are responsible for measuring specimen surface temperature; The K type thermopair of sample back side center weld is responsible for measuring the temperature having the sample back side.
The welding process of K type thermopair 7 is as follows:
A, by the oxyacetylene torch spray gun welding of NiCr, NiSi silk;
B, the NiCr-NiSi contact micro capacitance spot welding instrument after welding to be welded in after sample.
During measurement, the rate of heat addition of resistance furnace can be 20 DEG C/min, S type thermopair and temperature signal is sent to digital temperature registering instrument, can real-time data collection and displays temperature, when S type thermopair record temperature reaches 1100 DEG C, and after a period of stabilisation, can stop heating, sample cools gradually.The data of moisture recorder input to computing machine, then the effect of heat insulation Δ T of coating is exactly the difference of the temperature on two sides.
Two samples can obtain four temperature curves, without coating sample skin temperature profile respectively, coated sample skin temperature profile, without coating sample back temperature curve, coated sample back temperature curve, as shown in Figure 3,1100 DEG C are maintained without coating sample surface temperature and coated sample surface temperature, be 991.2 DEG C after stable without coating sample back temperature, be 900.7 DEG C after coated sample back temperature is stable, recording coating adiabatic temperature is 90.5 DEG C.Illustrate that coating effect of heat insulation is 90.5 DEG C under this kind of process conditions, effect of heat insulation is good, and the later stage can continue to measure the adiabatic temperature of coating after certain times of thermal cycle, can explore coating heat-proof quality Changing Pattern better in conjunction with coating microstrueture.
Claims (3)
1. test a method for thermal barrier coating adiabatic temperature, it is characterized in that, comprise the steps:
(1) having coating sample and welding K type thermopair respectively without the back side of coating sample by same matrix material, then be fixed in two through holes of the adiabatic fire door that resistance furnace improves respectively, the back side of sample directly and atmosphere, towards burner hearth before sample; Wherein, the welding technology of described K type thermopair is as follows:
A, by the oxyacetylene torch spray gun welding of NiCr-NiSi silk;
B, the NiCr-NiSi contact micro capacitance spot welding instrument after welding is welded in after sample;
(2) adiabatic fire door is equipped with two S type thermopairs, the contact of every S type thermopair is close to the front center of a sample, is responsible for the surface temperature measuring sample; The temperature measuring the sample back side is responsible for by the K type thermopair of sample back side welding,
(3) to resistance furnace electrified regulation, temperature signal is sent to digital temperature registering instrument by S type thermopair, when in-furnace temperature reaches 1100 DEG C, and after a period of stabilisation, stop heating, sample cools with stove, and the temperature data of digital temperature registering instrument is drawn temperature curve, then the effect of heat insulation Δ T of thermal barrier coating be exactly without coating sample back temperature and have the difference of back temperature of coating sample.
2. the method for test thermal barrier coating adiabatic temperature as claimed in claim 1, it is characterized in that, the described rate of heat addition is 20 DEG C/min.
3. the method for test thermal barrier coating adiabatic temperature as claimed in claim 1, it is characterized in that, adiabatic fire door two through holes of described improvement, it is hydraucone towards the one end inside fire door, this hydraucone is positioned on the boss inside fire door, all ceramic embedded pipe in two through holes, and sample is fixed on ceramic pipe end, near the hydraucone of through hole, described S type thermopair pierces into hydraucone from boss side.
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| CN104777187A (en) * | 2014-12-05 | 2015-07-15 | 襄阳航泰动力机器厂 | Thermal barrier coating heat insulation performance testing device |
| CN104792819A (en) * | 2015-04-16 | 2015-07-22 | 东方电气集团东方汽轮机有限公司 | Heat barrier coating heat insulation effect testing device for fuel machine |
| CN105301048B (en) * | 2015-11-17 | 2018-01-09 | 中国航天科技集团公司第四研究院第四十一研究所 | A kind of heat insulating coat test specimen interface temperature method of testing of pre-buried thermocouple |
| CN106353361A (en) * | 2016-09-29 | 2017-01-25 | 哈尔滨工业大学 | Method for testing laser absorptivity of material with coating layer |
| CN106324028A (en) * | 2016-10-22 | 2017-01-11 | 湖南省冶金材料研究院 | Testing device and testing method for determining thermal insulation effect of thermal barrier coating |
| CN107941848A (en) * | 2017-10-20 | 2018-04-20 | 北京绿时顺风科技有限公司 | The apparatus and method for directly measuring block materials thermal barrier coating adiabatic temperature |
| CN110501085A (en) * | 2018-12-11 | 2019-11-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of thermal barrier coating heat-proof quality measurement method based on film thermometric |
| CN114234645B (en) * | 2022-02-24 | 2022-06-17 | 山东慧敏科技开发有限公司 | High-temperature convection radiation heat transfer experimental device and experimental method |
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