CN110501085A - A kind of thermal barrier coating heat-proof quality measurement method based on film thermometric - Google Patents
A kind of thermal barrier coating heat-proof quality measurement method based on film thermometric Download PDFInfo
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- CN110501085A CN110501085A CN201910874640.8A CN201910874640A CN110501085A CN 110501085 A CN110501085 A CN 110501085A CN 201910874640 A CN201910874640 A CN 201910874640A CN 110501085 A CN110501085 A CN 110501085A
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The thermal barrier coating heat-proof quality measurement method based on film thermometric that the present invention relates to a kind of belongs to heat-proof quality measurement and evaluation field.Measurement method of the present invention is mainly made of internal layer membrane temperature sensor, outer membrane temperature sensor and sensor lead, inside and outside layer temperature sensor is film temperature sensor, thermal barrier coating two sides are successively coated on using process for plating, inside and outside layer film temperature sensor is arranged in pairs, the difference of the measured value of pairs of ectonexine film temperature sensor, thermal barrier coating is characterized in the heat-insulated temperature difference of measurement point, can need to be designed to multi-point measurement system according to measurement.The present invention does not destroy substrate, and measurement error is small, but also can be able to solve the measurement of aero engine turbine blades thermal barrier coating heat-proof quality with multimetering and be evaluated faced problem.
Description
Technical field
The present invention relates to a kind of measurement methods of thermal barrier coating heat-proof quality, and in particular to a kind of heat based on film thermometric
Barrier coating heat-proof quality measurement method, the heat-proof quality suitable for aero engine turbine blades thermal barrier coating measures and evaluation,
Belong to heat-proof quality measurement and evaluation field.
Background technique
With the continuous promotion of aero-engine performance, combustor exit temperature also improves again and again, each portion of numbers of hot-side engine
The operating condition of part is more and more severe.Thermal barrier coating (TBCs) has as the raising each component use temperature upper limit in aero-engine hot end
Effect means will have been more and more widely used in engine of new generation.Thermal barrier coating heat-proof quality is the weight of thermal barrier coating
Performance indicator is wanted, accurate measurement has very important significance, for the engineer application of thermal barrier coating, failure analysis and service life
Conclusive effect is estimated.Evaluation for thermal barrier coating heat-proof quality, currently used method include ground run comparison
Rating method, thermophysical property evaluation assessment and heat-insulated temperature difference rating method.Wherein heat-insulated temperature difference rating method passes through the direct table of the heat-insulated temperature difference
The heat-proof quality for levying heat-barrier material is a kind of most intuitive method.But the measurement of the heat-insulated temperature difference of thermal barrier coating is extremely difficult, mesh
Preceding usually used conventional thermocouples measure, and there are two types of measurement methods: one is thermocouple junction is fixed in test specimen two
Side, what is measured in this way is the temperature difference of test specimen two sides, rather than coating two sides temperature, measurement error are larger；Another kind is in substrate
Then upper fluting will be surface-treated smooth and then be coated with thermal barrier coating above, this method is due to destroying inside substrate
Structure, accuracy of measurement improve limited.The present invention is a kind of heat-proof quality measurement method based on film-sensing technology, passes through cloth
The film temperature sensor for being placed in coating two sides is thermally shielded differential temperature survey, since the thickness of film temperature sensor only has more than ten
The magnitude of micron, adhesive force is strong, is firmly attached on substrate and substrate becomes an entirety, surface temperature measurement error is very
It is small, while not needing to destroy substrate self structure, therefore higher accuracy of measurement can be obtained.
Summary of the invention
The present invention provides a kind of thermal barrier coating heat-proof quality measurement method based on film thermometric, can effectively measure coating
The temperature of two sides, and then obtain the heat-insulated temperature difference of coating.Its structural schematic diagram is shown in attached drawing 1 and attached drawing 2.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of thermal barrier coating heat-proof quality measurement method based on film thermometric, internal layer membrane temperature sensor is sputtered at
On metal substrate；It is coated with thermal barrier coating again, is covered the plating of internal layer membrane temperature sensor by thermal barrier coating；Then in thermal boundary
Corresponding position is coated with outer membrane temperature sensor on the outside of coating；Finally by sensor lead by internal layer membrane temperature sensor
It is connect with outer membrane temperature sensor, realizes the heat-insulated differential temperature survey of the point；
The internal layer membrane temperature sensor quantity is one or more；When internal layer membrane temperature sensor quantity is one
When a, spot measurement is realized；When internal layer membrane temperature sensor quantity is multiple, multimetering is realized；
Internal layer membrane temperature sensor uses thermocouple temperature measurement principle, in order to realize thermocouple temperature measurement on metal substrate,
Film temperature sensor is designed to multiple membrane structure, as shown in Fig. 3.It is most transition zone close to the film layer of metal substrate,
Film material is NiCrAlY alloy.Transition zone outer layer is insulating layer, and insulating layer uses Al2O3, need to guarantee insulating layer overlay area
It is intended to insulate, is not allow for leak source.Sensitive layer can select different thermocouple types, such as S type, Type B according to temperature-measuring range,
Sensitive layer is located on the outside of insulating layer, and thickness control is in 1 μm~3 μ ms.It is protective layer on the outside of sensitive layer, protective layer was coated with
It is needed in journey by the lead terminal partial denudation of sensitive layer outside, protective layer uses Al2O3Production.
Outer membrane temperature sensor is coated on the outside of thermal barrier coating, and film layer structure schematic diagram is as shown in Fig. 4.By
It is to insulate, therefore do not need in addition to be coated with insulating layer in engine turbine blade thermal barrier coating itself, is directly coated with sensitive layer
With protective layer.Sensitive layer is consistent with internal layer membrane temperature sensor.
The lead of film temperature sensor is used to spread out of the temperature signal measured, and lead material and sensitive layer material are kept
Unanimously, select the thermocouple of corresponding type as lead.The lead and lead terminal being coated in substrate can be set as required
Count corresponding mask plate, the trend of lead and interval can be with designed, designeds, but should ensure that between lead without intersection, while paying attention to drawing
Line terminals keep enough distances apart from substrate edge.
Beneficial effect
The present invention uses inside and outside two layers groups of film temperature sensor, is coated on thermal barrier coating by coating technique
Two sides, due to the very thin thickness of film temperature sensor, adhesive force is strong, can effectively measure the heat-insulated thermal field of thermal barrier coating.
It does not destroy substrate compared with other current methods, and measurement error is small, but also can be able to solve aviation hair with multimetering
The problem that motivation thermal barrier coating of turbine blade heat-proof quality measures and evaluation is faced.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is diagrammatic cross-section of the invention；
Fig. 3 is the diagrammatic cross-section of internal layer membrane temperature sensor；
Fig. 4 is the diagrammatic cross-section of outer membrane temperature sensor.
Wherein, 1-metal substrate, 2-internal layer membrane temperature sensors, 3-thermal barrier coatings, 4-outer membrane temperature pass
Sensor, 5-No.1 measuring points, 6-No. two measuring points, 7-No. three measuring points, 8-are coated with lead, and 9-are coated with lead terminal, 10-transition
Layer, 11-insulating layers, 12-sensitive layers, 13-protective layers, 14-sensitive layers, 15-protective layers.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1, main contents according to the present invention, design multiple spot heat insulating coat heat-proof quality measuring device, including gold
Belong to substrate 1, internal layer membrane temperature sensor 2, thermal barrier coating 3, the measuring point 6,3 of measuring point 5,2 of outer membrane temperature sensor 4,1
Number measuring point 7, is coated with lead 8, is coated with lead terminal 9.The internal layer membrane temperature sensor 2 passes through the method being coated with and is coated on
On the surface of metal substrate 1, it then is coated with thermal barrier coating 3 according to normal process in the outside of internal layer membrane temperature sensor 2 again,
It finally is coated with outer membrane temperature sensor 4 in the outside of thermal barrier coating 3, as shown in Figure 2.The internal layer temperature sensor 2
For the thermocouple sensor of multi-layer film structure, including transition zone 10, insulating layer 11, sensitive layer 12 and protective layer 13, such as Fig. 3 institute
Show.The outer membrane temperature sensor 4 is equally multi-layer film structure, including sensitive layer 14 and protective layer 15, such as Fig. 4 institute
Show.
A kind of thermal barrier coating heat-proof quality measurement method based on film thermometric, it is thin on nickel based metal substrate to be coated with internal layer
Film temperature sensor 2.Be coated with transition zone 10 first, select NiCrAlY alloy target material, by the method for electron beam be coated with a thickness of
8 μm of transition zone；Next it is coated with insulating layer 11, selects Al2O3The nonmetallic target of preparation is plated by the method for magnetron sputtering
The insulating layer with a thickness of 10 μm is made, then checks insulation resistance by the way of sampling observation, insulation resistance is in 3.5M Ω or so；It connects down
Carry out a step and be coated with sensitive layer 12, using S type thermocouple, i.e. platinum rhodium 10- platinum, wherein target of the anode using the preparation of 10 alloy of platinum rhodium
Be coated with, cathode using pure platinum preparation target be coated with, two-stage with a thickness of 2 μm or so；It is finally coated with protective layer 13, is used
Al2O3The nonmetallic target of preparation, is coated with the protective layer with a thickness of 1 μm.In above-mentioned all film layers during being coated with, using covering
Diaphragm plate carries out mask process, by the design of mask plate, by measuring point 5, measuring point 6, measuring point 7 and can be coated with lead 8 and is coated with
Lead terminal 9 is arranged into suitable position.
After the completion of internal layer membrane temperature sensor 2 is coated with, it is coated with heat insulating coat 3 according to normal process, in thermal barrier coating 3
Appearance is coated with outer membrane temperature sensor 4.Since the insulation characterisitic of thermal barrier coating 3 itself can satisfy requirement, at it
On be directly coated with the sensitive layer 14 of outer membrane temperature sensor, using S type thermocouple, i.e. platinum rhodium 10- platinum, wherein anode uses
10 alloy of platinum rhodium preparation target be coated with, cathode using pure platinum preparation target be coated with, two-stage with a thickness of 2 μm or so；
Protective layer 15 is finally coated on the outside of sensitive layer, using Al2O3The nonmetallic target of preparation, is coated with the protective layer with a thickness of 3 μm.
During being coated with, it is coated with using same set of mask plate.
After the completion of inside and outside layer film temperature sensor is coated with, lead processing is carried out, lead material and sensitive layer material are kept
Unanimously, diameter is used to carry out lead for the S type thermocouple of 0.3mm.Thermo wires end is suppressed, is pressed into 0.6mm's wide
Flat, being coated on lead terminal 9 of substrate then is crimped on by high-temperature adhesives.
Above-described specific descriptions have carried out further specifically the purpose of invention, technical scheme and beneficial effects
It is bright, it should be understood that the above is only a specific embodiment of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (5)
1. a kind of thermal barrier coating heat-proof quality measurement method based on film thermometric, it is characterised in that: pass internal layer membrane temperature
Sensor is sputtered on metal substrate；It is coated with thermal barrier coating again, internal layer membrane temperature sensor is plated by thermal barrier coating and is covered；So
Corresponding position is coated with outer membrane temperature sensor on the outside of thermal barrier coating afterwards；Finally by the lead of sensor by internal layer membrane
Temperature sensor and the collected temperature signal of outer membrane temperature sensor are drawn, and realize the heat-insulated differential temperature survey of the point；
The internal layer temperature sensor is the thermocouple sensor of multi-layer film structure, including transition zone 10, and insulating layer is sensitive
Layer and protective layer；Transition zone, insulating layer, sensitive layer and protective layer are successively coated on the metal substrate；
The outer membrane temperature sensor is multi-layer film structure, including sensitive layer and protective layer；In the thermal barrier coating
On be successively coated with sensitive layer and protective layer.
2. a kind of thermal barrier coating heat-proof quality measurement method based on film thermometric as described in claim 1, it is characterised in that:
The internal layer membrane temperature sensor quantity is one or more；It is real when internal layer membrane temperature sensor quantity is one
Existing spot measurement；When internal layer membrane temperature sensor quantity is multiple, multimetering is realized.
3. a kind of thermal barrier coating heat-proof quality measurement method based on film thermometric as described in claim 1, it is characterised in that:
The buffer layer material is NiCrAlY alloy；The insulating layer material is Al2O3；The protective layer material is Al2O3；It is described quick
Layer is felt with a thickness of 1 μm~3 μm.
4. a kind of thermal barrier coating heat-proof quality measurement method based on film thermometric as described in claim 1, it is characterised in that:
Lead material is consistent with sensitive layer material, selects the thermocouple of corresponding type as lead；The lead being coated in substrate
Corresponding mask plate can be designed as required with lead terminal, and the trend of lead and interval can be with designed, designeds, but should protect
Without intersection between card lead, while noticing that lead terminal keeps enough distances apart from substrate edge.
5. the method as described in Claims 1-4 any one, it is characterised in that: it is thin on nickel based metal substrate to be coated with internal layer
Film temperature sensor: being coated with transition zone first, selects NiCrAlY alloy target material, is coated with by the method for electron beam with a thickness of 8 μm
Transition zone；Next it is coated with insulating layer, selects Al2O3The nonmetallic target of preparation, is coated with thickness by the method for magnetron sputtering
For 10 μm of insulating layer, insulation resistance then is checked by the way of sampling observation, insulation resistance is in 3.5M Ω or so；A following step
It is coated with sensitive layer, using S type thermocouple, i.e. platinum rhodium 10- platinum, wherein anode is coated with using the target of platinum-rhodium alloy preparation, cathode
Using pure platinum prepare target be coated with, two-stage with a thickness of 2 μm or so；It is finally coated with protective layer, using Al2O3Preparation
Nonmetallic target is coated with the protective layer with a thickness of 1 μm；
After the completion of internal layer membrane temperature sensor is coated with, it is coated with heat insulating coat according to normal process, is plated in the appearance of thermal barrier coating
Outer membrane temperature sensor processed；Since the insulation characterisitic of thermal barrier coating itself can satisfy requirement, direct plating on it
The sensitive layer of outer membrane temperature sensor processed, using S type thermocouple, i.e. platinum rhodium 10- platinum, wherein anode uses platinum-rhodium alloy system
Standby target is coated with, cathode using pure platinum preparation target be coated with, two-stage with a thickness of 2 μm or so；Finally in sensitive layer
Outside is coated with protective layer, using Al2O3The nonmetallic target of preparation, is coated with the protective layer with a thickness of 3 μm；
After the completion of inside and outside layer film temperature sensor is coated with, lead processing is carried out, lead material and sensitive layer material keep one
It causes, diameter is used to carry out lead for the S type thermocouple of 0.3mm；Thermo wires end is suppressed, the flat of 0.6mm wide is pressed into
Then piece is crimped on being coated on lead terminal of substrate by high-temperature adhesives.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987215A (en) * | 2019-12-31 | 2020-04-10 | 电子科技大学 | Film temperature sensor for detecting thermal insulation effect of thermal barrier coating |
| CN111220647A (en) * | 2020-01-20 | 2020-06-02 | 西安交通大学 | Non-contact nondestructive testing method and device for thermal insulation temperature of thermal barrier coating |
| CN111366264A (en) * | 2020-04-28 | 2020-07-03 | 北京航空航天大学 | Multilayer thermal barrier coating and surface layer and bottom layer temperature measurement method based on phosphorescence |
| CN114660112A (en) * | 2022-05-25 | 2022-06-24 | 河南源宏高分子新材料有限公司 | Method for detecting temperature barrier property of recycled polyester material |
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| CN114660112A (en) * | 2022-05-25 | 2022-06-24 | 河南源宏高分子新材料有限公司 | Method for detecting temperature barrier property of recycled polyester material |
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