CN103134828A - Synchronization testing device and testing method of thermal barrier performance and thermal shock performance of thermal barrier coating - Google Patents
Synchronization testing device and testing method of thermal barrier performance and thermal shock performance of thermal barrier coating Download PDFInfo
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Abstract
The invention relates to a device and a method in the testing technical field, in particular to a synchronization testing device and a testing method of thermal barrier performance and thermal shock performance of a thermal barrier coating. The method enables the thermal barrier performance and the thermal shock performance of the thermal barrier coating to be obtained simultaneously and temperature change of a test sample in a thermal shock performance testing process to be recorded in detail, and facilitates deep analysis of the thermal shock failure mechanism of the test sample. According to the testing method, heating and cooling methods of the test sample can be determined as needed, and therefore serving conditions of a thermal barrier coating component can be simulated close to reality, quality of the thermal barrier coating can be tested accurately, the service life of the thermal barrier coating can be estimated accurately, and further the spraying effect of the serving component under a high-temperature working condition can be effectively estimated.
Description
Technical field
What the present invention relates to is a kind of device and method of testing thereof of technical field of measurement and test, particularly thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device and method of testing thereof.
Background technology
The coat system that thermal barrier coating generally is comprised of top layer ceramic coat and intermetallic metal tack coat.Adopt the technology such as flame spraying, plasma spraying, electro beam physics vapour deposition, prepare thermal barrier coating at the high-temperature heating parts surface, utilize the good thermal boundary of thermal barrier coating to be used for protecting the heating part matrix material, and then improve the heating part working temperature.Thermal Barrier Coating Technologies is in field widespread uses such as Aero-Space, fuel gas generations, and at present, Thermal Barrier Coating Technologies also has greater advance in the application aspect the superhigh temperature shaping dies.
The static normal temperature physicochemical such as the described thermal conductivity of domestic and foreign literature, bond strength, microhardness detects index, can not truly reflect the situation of heating part under the high-temperature service operating mode.By comparison, the thermal boundary performance of coating can the reflect heat barrier coating to the effect of heat insulation of parts metallic matrix, but guarantee that metallic matrix works in the tolerable temperature scope; The thermal shock performance of coating can reflect intuitively that coating and metallic matrix bond strength and coating are from non-destructive cycle index under the effect of colding and heat succeed each other.Thermal boundary performance and thermal shock performance are the important indicators of estimating thermal barrier coating.
It is low that the thermal boundary performance of thermal barrier coating is based on top layer ceramic coat thermal conductivity, the high temperature heat that can effectively hinder under the military service operating mode passes to the parts metallic matrix, thereby guarantee that the metal substrate temperature is relatively low, avoid occurring metallic matrix overheated and cause initial failure, the thermal boundary performance usually with coating surface temperature and metallic matrix temperature gap as decision condition.The thermal shock performance of thermal barrier coating is from thermoelastic theory, and as coating thermal shock fatigue foundation, non-destructive times of thermal cycle is as decision condition with the opposing thermal stress with the equilibrium condition between the thermal stress in coating and material inherent strength.By the thermal boundary performance test of thermal barrier coating, can understand the effect of heat insulation of thermal barrier coating in depth, and then the bonded block working temperature, determine whether thermal barrier coating can satisfy actual condition thermal boundary demand.Thermal shock performance test by thermal barrier coating can be investigated invalid characteristic and the failure mechanism of thermal barrier coating, provides foundation to the life prediction of thermal barrier coating.
Through the prior art literature search is found, the thermal boundary performance test of thermal barrier coating and thermal shock performance testing experiment, all carry out separately, usually need the two above test units of cover just can complete test, not only expend more time energy, and the temperature fluctuation of sample thermal shock performance process of the test also fails real time record, and is unfavorable to analysing in depth sample thermal shock failure mechanism.Prior art test thermal barrier coating thermal shock performance often adopts flame or heating furnace heating, and the type of cooling is sample hardening, air cooling or air cooling rapidly, but a kind of only for the sample coating surface type of cooling or the sample metallic matrix type of cooling of the type of cooling.To being used for the thermal barrier coating on the superhigh temperature shaping dies, except adopt metallic matrix cooling, during to the mold cavity release agent spraying, coating surface is also had cooling effect during die sinking.The test method of prior art test thermal barrier coating thermal boundary performance can not be simulated the military service operating mode of superhigh temperature shaping dies thermal barrier coating fully.
Summary of the invention
Technical matters of the present invention is to overcome prior art thermal barrier coating thermal boundary performance and thermal shock performance can not be tested simultaneously and the thermal shock testing experiment type of cooling is single technical deficiency, overcome that prior art can not effectively be simulated superhigh temperature shaping dies metallic matrix and surface coating all has the cooling military service operating mode of medium, provide a kind of and can high-level efficiency complete simple sample thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device and method of testing thereof, be used for realizing thermal barrier coating thermal boundary performance and thermal shock performance synchronism detection.
To achieve these goals, thermal barrier coating thermal boundary performance provided by the invention and thermal shock performance synchronous testing device comprise heating furnace, feed arrangement, cooling device, temperature measuring equipment, control system, it is characterized in that, also comprise:
The ceramic plug of sample end water conservancy diversion heat eliminating medium;
Control according to described control system, when the ceramic plug of described sample end water conservancy diversion heat eliminating medium is arranged on sample front end and described sample and is arranged on described feed arrangement, start described heating furnace and after design temperature insulation certain hour, start described cooling device the logical heat eliminating medium of sample metallic matrix is carried out circulating cooling, start simultaneously described temperature measuring equipment to metallic matrix temperature real time record, start at last described feed arrangement sample is entered in described heating furnace; When sample stops setting-up time in described heating furnace after, under driving, described feed arrangement shifts out described heating furnace, start described cooling device cooling to described sample coating surface, and close cooling to described sample coating surface of described cooling device when described sample is cooled to the temperature that test needs; Described sample begins to enter described heating furnace under described feed arrangement drives automatically, begins next working cycle, until surface imperfection appears in described sample thermal barrier coating, test stops.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, wherein, described feed arrangement comprises feed mechanism push rod and feed mechanism main frame, and described feed mechanism push rod can be installed described sample and drive the described heating furnace of described sample turnover under described feed mechanism host driven.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, wherein, described feed arrangement also is provided with locating device, is used for the distance that the restriction sample advances or retreats.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, wherein, described feed arrangement also is provided with heart section pipeline, be used for the logical hydronic heat eliminating medium of sample metallic matrix, the thermopair that moisture recorder connects also by the heart section pipeline of feed arrangement by and insert in described sample metallic matrix.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, wherein, described feed arrangement also is provided with counter, is used for the number of times of sample turnover heating furnace is added up.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, wherein, described temperature measuring equipment is moisture recorder and the infrared thermometer that is connected with thermopair, the described moisture recorder that is connected with thermopair is to metallic matrix temperature real time record, and described infrared thermometer carries out thermometric to the sample coating surface.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, wherein, described control system is the PLC controller.
To achieve these goals, the present invention also provides thermal barrier coating thermal boundary performance and thermal shock performance synchronous detecting method, it is characterized in that, comprising:
Step 1, the ceramic plug of described sample end water conservancy diversion heat eliminating medium is arranged on the sample front end and more described sample is arranged on described feed arrangement;
Step 2 starts described heating furnace and is incubated certain hour at design temperature;
Step 3 starts described cooling device the logical heat eliminating medium of described sample metallic matrix is carried out circulating cooling, starts simultaneously described temperature measuring equipment to described sample metallic matrix temperature real time record;
Step 4 starts described feed arrangement and makes described sample enter in described heating furnace and after stopping setting-up time, shift out described heating furnace under described feed arrangement drives;
Step 5 starts described cooling device cooling to described sample coating surface, and closes cooling to described sample coating surface of described cooling device when described sample is cooled to the temperature that test needs; Described sample begins to enter described heating furnace under described feed arrangement drives automatically, begins next working cycle, until surface imperfection appears in described sample thermal barrier coating, test stops.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous detecting method, wherein, described step 3 and step 5 further comprise:
Select cooling liquid or cooling draught as heat eliminating medium and by the step of flow pressure table to cooling medium consumption control.
Described thermal barrier coating thermal boundary performance and thermal shock performance synchronous detecting method, wherein, described step 5 further comprises:
Adopt infrared thermometer to measure the step of sample coating surface temperature.
Useful technique effect of the present invention is:
The present invention can obtain thermal barrier coating thermal boundary performance and thermal shock performance simultaneously, and can detail record to the temperature variation of sample thermal shock performance test process, is conducive to more analyse in depth sample thermal shock failure mechanism.
The present invention can set as required to sample heating and cooling mode, thereby simulate more really the military service operating mode of thermal barrier coating parts, can test more accurately the quality of thermal barrier coating and estimate the life-span of thermal barrier coating, thereby the spraying effect of military service parts under worst hot case is carried out Efficient Evaluation.
The present invention provides proving installation and method of testing easily to thermal barrier coating thermal boundary performance and thermal shock performance, can be widely used in the research, development and production practice of each association area of thermal barrier coating.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is thermal barrier coating thermal boundary performance of the present invention and thermal shock performance synchronous testing device schematic diagram;
Fig. 2 is that the present invention tests thermal barrier coating thermal boundary performance and the required sample pole of thermal shock performance schematic cross-sectional view.
Wherein, Reference numeral:
1-heating furnace, 2-sample coating surface cooling device, 3-ceramic plug, 4-sample, 5-feed mechanism push rod, 6-moisture recorder, 7-feed mechanism main frame, 8-sample metallic matrix cooling device, 9,12,13,16-sample thermometer hole, 10,11,14,15-sample Cooling Holes.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is made further more detailed description.
Fig. 1 is thermal barrier coating thermal boundary performance of the present invention and thermal shock performance synchronous testing device schematic diagram, and Fig. 2 is that the present invention tests thermal barrier coating thermal boundary performance and the required sample pole of thermal shock performance schematic cross-sectional view.
The invention discloses thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, be adopt heating furnace that temperature can accurately be controlled to heat, adopts mode that metallic matrix and coating surface make up as required to carry out cooling and heat eliminating medium is optional, employing moisture recorder Real-Time Monitoring and record metallic matrix temperature, employing PLC(Programmable Logical Controller, programmable logic controller (PLC)) automatically control as required heat time heating time and cool time.Therefore have that analog temperature is accurate, the type of cooling is various, thermometric accurately and real time record, test work step control the characteristics such as accurate.Adopt PLC automatically to control, have irreplaceable superiority when carrying out a large amount of revision tests and long-time test.When obtaining the thermal barrier coating thermal shock performance by test unit of the present invention, can obtain the thermal boundary performance of thermal barrier coating, make up the technology limitation that one group of test only detects single performance, can Efficient Evaluation thermal barrier coating quality.
Utilize the good thermal boundary performance of thermal barrier coating can effectively prevent heating part metallic matrix excess Temperature, thereby improve performance and the service life of heating part, therefore, the thermal boundary performance is one of important indicator of assessment thermal barrier coating quality.Because the thermal expansion coefficient difference of thermal barrier coating and metallic matrix is larger, coating crack and coating stripping become the main failure forms of thermal barrier coating, and therefore, thermal shock performance is also the important indicator of assessment thermal barrier coating quality.The present invention is by simulation thermal barrier coating service features, particularly simulate the military service features of the superhigh temperature shaping dies thermal barrier coating of recent research, mainly for detection of thermal boundary performance and the thermal shock performance of thermal barrier coating, provide foundation for better assessing the thermal barrier coating service performance.
In Fig. 1, the testing machine schematic diagram comprises heating furnace 1, sample coating surface cooling device 2, ceramic plug 3, sample 4, feed mechanism push rod 5, moisture recorder 6, feed mechanism main frame 7, sample metallic matrix cooling device 8.In Fig. 2, sample pole schematic cross-sectional view comprises sample thermometer hole 9,12,13,16, sample Cooling Holes 10,11,14,15.
Heating furnace 1 is electric tube furnace, can accurately set Heating Zone Temperature, and the furnace tubing horizontal positioned is coaxial with sample during test.
Sample coating surface cooling device 2 be fixed on sample outside heating furnace the sample stop position directly over, can lead to as required the different heat eliminating mediums such as chilled water or pressurized air and carry out cooling to the sample coating surface.
Sample 4 is the metal base pole of surface spraying thermal barrier coating, and an end is arranged on feed mechanism push rod 5 with inserted mode, and the other end matches with the ceramic plug 3 that plays the heat eliminating medium guide functions with inserted mode equally.In Fig. 2, sample pole transversal section Cooling Holes is through hole, can select heat eliminating medium from Cooling Holes 10,15 inputs and export from Cooling Holes 11,14, or selecting other array mode input and output.In Fig. 2, sample pole transversal section thermometer hole is set to sample transversal section radial direction and evenly distributes, fully warranty test data accuracy and regularity.The position of sample 4 transversal section Cooling Holes and thermometer hole can be set in actual applications, as required.
Feed mechanism push rod 5 is the steel pipe of surface spraying thermal barrier coating, one end is used for installing sample 4, the other end is connected on feed mechanism main frame 7 by pressing plate, drives by feed mechanism main frame 7 under the instruction of PLC controller and advances or retreat, and sample is mainly played gearing.Feed mechanism push rod 5 and feed mechanism main frame 7 also arrange the heart section pipeline with sample 4 Cooling Holes and thermometer hole size and position consistency, sample metallic matrix cooling device 8 is transferred to the sample Cooling Holes via feed mechanism push rod 5 and feed mechanism main frame 7 heart section pipelines with heat eliminating medium, and the sample Cooling Holes transmits the heat eliminating medium of returning to be got back in sample metallic matrix cooling device 8 via feed mechanism push rod 5 and feed mechanism main frame 7 heart section pipelines again.Also be provided with counter on feed mechanism main frame 7, be used for the number of times of statistical test sample 4 turnover heating furnaces 1.
Metallic matrix cooling device 8 upper surfaces are provided with overflow groove, and when the heat eliminating medium that 2 pairs of samples of sample coating surface cooling device, 4 coating surfaces adopt was liquid, cooling liquid can be discharged by described overflow groove.
When carrying out testing experiment, at first ceramic plug 3 is arranged on sample 4 one ends, again sample 4 other ends are inserted on feed mechanism push rod 5 and install, then start heating furnace 1 and after design temperature insulation certain hour, start the logical heat eliminating medium of 8 pairs of sample metallic matrixes of sample metallic matrix cooling device and carry out circulating cooling, 6 pairs of metallic matrix temperature real time record of start-up temperature registering instrument, start feed mechanism main frame 7 at last simultaneously, and sample 4 is entered in heating furnace 1 under 5 transmissions of feed mechanism push rod; When sample 4 after the interior stop setting-up time of heating furnace 1, feed mechanism main frame 7 is auto-reverse, sample 4 withdraws from heating furnace 1 under 5 transmissions of feed mechanism push rod, start 2 pairs of sample 4 coating surfaces of sample coating surface cooling device cooling, utilize the infrared thermometer (not shown) to sample 4 coating surface thermometrics, close the cooling of 2 pairs of sample 4 coating surfaces of sample coating surface cooling device when sample 4 is cooled to the temperature of test needs; Sample 4, begins to enter heating furnace 1 with feed mechanism push rod 5 under feed mechanism main frame 7 drives automatically, begins next working cycle, until surface imperfection appears in thermal barrier coating, test stops.
The process of the test of proving installation of the present invention is described below in conjunction with embodiment.
Embodiment 1
The thermal barrier coating sample specifically is of a size of: specimen configuration Φ 60 * 120mm; 4 Cooling Holes Φ 8 * 120mm, the hole heart press Fig. 2 mode array distribution apart from sample center 9mm; 4 thermometer hole Φ 8 * 80mm, the thermometer hole hole heart is followed successively by 16mm, 28mm, 40mm and 52mm apart from the sample center, distributes by Fig. 2 mode.
Ceramic plug 3 is arranged on an end of thermal barrier coating sample, then sample is arranged on feed mechanism push rod 5, make sample Cooling Holes and feed mechanism push rod 5 Cooling Holes position consistency corresponding to heart section's pipeline, and the thermopair that moisture recorder 6 is connected inserts sample thermometer hole 9,12,13,16 via feed mechanism push rod 5 heart section pipelines.Start heating furnace 1, set heating furnace 1 temperature and be 1500 ℃ and after this temperature stabilization 10min, start the logical chilled water of 8 pairs of sample metallic matrixes of sample metallic matrix cooling device and carry out circulating cooling, make chilled water from sample Cooling Holes 10,15 inputs and export from Cooling Holes 11,14,6 pairs of metallic matrix temperature real time record of while start-up temperature registering instrument, start at last feed mechanism main frame 7, sample 4 is entered in heating furnace 1 under 5 transmissions of feed mechanism push rod; When sample 4 after the interior stop setting-up time of heating furnace 1 5s, feed mechanism main frame 7 is auto-reverse, sample 4 withdraws from heating furnace 1 under 5 transmissions of feed mechanism push rod, start the logical pressure-air cooling of 2 pairs of sample coating surfaces of sample coating surface cooling device, utilize the infrared thermometer (not shown) to sample 4 coating surface thermometrics, when sample 4 is cooled to 200 ℃ of temperature that test needs, close the cooling of 2 pairs of sample 4 coating surfaces of sample coating surface cooling device; Sample 4, begins to enter heating furnace 1 with feed mechanism push rod 5 under feed mechanism main frame 7 drives automatically, begins next working cycle, until surface imperfection appears in thermal barrier coating, test stops.
In process of the test, moisture recorder 6 real time record the metallic matrix temperature at sample 4 diverse location places, be analyzed by come out of the stove 200 ℃ of cooled temperature of 1500 ℃ of furnace temperature setting with heating furnace 1 and sample 4, can obtain the thermal boundary performance of thermal barrier coating.By the meter reading on feed mechanism main frame 7, can obtain the number of times that working cycle repeats, in conjunction with the microscopic observation of sample 4 thermal barrier coating surface imperfection and the situation of change of sample 4 surface coatings and metallic matrix temperature, can obtain the thermal shock performance of thermal barrier coating.
Embodiment 2
The present embodiment and embodiment 1 difference are, the thermal barrier coating specimen configuration is of a size of Φ 48 * 120mm, the sample thermometer hole arranges 3, thermometer hole size Φ 8 * 80mm, the thermometer hole hole heart is followed successively by 16mm, 28mm, 40mm apart from the sample center, and Fig. 2 thermometer hole 12,13,16 position distribution are pressed respectively in the thermometer hole position.
Embodiment 3
The present embodiment and embodiment 1 difference be, heating furnace 1 Temperature Setting is 1200 ℃, and sample 4 is at the interior stop setting-up time of heating furnace 1 10s; When sample 4 is cooled to 100 ℃ of temperature that test needs, close the cooling of 2 pairs of sample 4 coating surfaces of sample coating surface cooling device.
Claims (10)
1. thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device, comprise heating furnace, feed arrangement, cooling device, temperature measuring equipment, control system, it is characterized in that, also comprises:
The ceramic plug of sample end water conservancy diversion heat eliminating medium;
Control according to described control system, when the ceramic plug of described sample end water conservancy diversion heat eliminating medium is arranged on sample front end and described sample and is arranged on described feed arrangement, start described heating furnace and after design temperature insulation certain hour, start described cooling device the logical heat eliminating medium of sample metallic matrix is carried out circulating cooling, start simultaneously described temperature measuring equipment to metallic matrix temperature real time record, start at last described feed arrangement sample is entered in described heating furnace; When sample stops setting-up time in described heating furnace after, under driving, described feed arrangement shifts out described heating furnace, start described cooling device cooling to described sample coating surface, and close cooling to described sample coating surface of described cooling device when described sample is cooled to the temperature that test needs; Described sample begins to enter described heating furnace under described feed arrangement drives automatically, begins next working cycle, until surface imperfection appears in described sample thermal barrier coating, test stops.
2. thermal barrier coating thermal boundary performance according to claim 1 and thermal shock performance synchronous testing device, wherein, described feed arrangement comprises feed mechanism push rod and feed mechanism main frame, and described feed mechanism push rod can be installed described sample and drive the described heating furnace of described sample turnover under described feed mechanism host driven.
3. thermal barrier coating thermal boundary performance according to claim 1 and 2 and thermal shock performance synchronous testing device, wherein, described feed arrangement also is provided with locating device, is used for the distance that the restriction sample advances or retreats.
4. according to claim 1,2 or 3 described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing devices, wherein, described feed arrangement also is provided with heart section pipeline, be used for the logical hydronic heat eliminating medium of sample metallic matrix, the thermopair that moisture recorder connects also by the heart section pipeline of feed arrangement by and insert in described sample metallic matrix.
5. according to claim 1,2,3 or 4 described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing devices, wherein, described feed arrangement also is provided with counter, is used for the number of times of sample turnover heating furnace is added up.
6. thermal barrier coating thermal boundary performance according to claim 1 and thermal shock performance synchronous testing device, wherein, described temperature measuring equipment is moisture recorder and the infrared thermometer that is connected with thermopair, the described moisture recorder that is connected with thermopair is to metallic matrix temperature real time record, and described infrared thermometer carries out thermometric to the sample coating surface.
7. according to claim 1,2,3,4,5 or 6 described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing devices, wherein, described control system is the PLC controller.
8. right to use requires thermal barrier coating thermal boundary performance and the thermal shock performance synchronous detecting method that 1 described thermal barrier coating thermal boundary performance and thermal shock performance synchronous testing device carry out, and it is characterized in that, comprising:
Step 1 is arranged on the sample front end with the ceramic plug of described sample end water conservancy diversion heat eliminating medium and more described sample is arranged on feed arrangement;
Step 2 starts described heating furnace and is incubated certain hour at design temperature;
Step 3 starts described cooling device the logical heat eliminating medium of described sample metallic matrix is carried out circulating cooling, starts simultaneously described temperature measuring equipment to described sample metallic matrix temperature real time record;
Step 4 starts described feed arrangement and makes described sample enter in described heating furnace and after stopping setting-up time, shift out described heating furnace under described feed arrangement drives;
Step 5 starts described cooling device cooling to described sample coating surface, and closes cooling to described sample coating surface of described cooling device when described sample is cooled to the temperature that test needs; Described sample begins to enter described heating furnace under described feed arrangement drives automatically, begins next working cycle, until surface imperfection appears in described sample thermal barrier coating, test stops.
9. thermal barrier coating thermal boundary performance according to claim 8 and thermal shock performance synchronous detecting method, is characterized in that, in described step 3 and step 5, further comprises:
Select cooling liquid or cooling draught as heat eliminating medium and by the step of flow pressure table to cooling medium consumption control.
10. according to claim 8 or 9 described thermal barrier coating thermal boundary performance and thermal shock performance synchronous detecting methods, is characterized in that, in described step 5, further comprises:
Adopt infrared thermometer to measure the step of sample coating surface temperature.
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| CN113804724B (en) * | 2021-09-29 | 2024-03-29 | 中北大学 | Method for testing heat insulation performance of thermal protection ceramic coating |
| CN115109897A (en) * | 2022-05-19 | 2022-09-27 | 华东理工大学 | Vacuum thermal cycle method for protective coating |
| CN115109897B (en) * | 2022-05-19 | 2024-03-08 | 华东理工大学 | Vacuum thermal circulation method for protective coating |
| CN117129511A (en) * | 2023-09-18 | 2023-11-28 | 安徽工程大学 | Terahertz online monitoring device and method for thermal fatigue behavior of thermal barrier coating |
| CN117129511B (en) * | 2023-09-18 | 2024-04-12 | 安徽工程大学 | Terahertz online monitoring device and method for thermal fatigue behavior of thermal barrier coating |
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Application publication date: 20130605 |