CN104330308A - SR-CR micro force loading device for detecting micro-nano structure evolution of material on line - Google Patents
SR-CR micro force loading device for detecting micro-nano structure evolution of material on line Download PDFInfo
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- CN104330308A CN104330308A CN201410640378.8A CN201410640378A CN104330308A CN 104330308 A CN104330308 A CN 104330308A CN 201410640378 A CN201410640378 A CN 201410640378A CN 104330308 A CN104330308 A CN 104330308A
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Abstract
The invention discloses an SR-CR micro force loading device for detecting the micro/nano structure evolution of a material on line. The SR-CR micro force loading device comprises an X light source, an optical path, and an image acquisition and reconstruction system, wherein a displacement driving system is arranged on the optical path of the X light source; the displacement driving system comprises a micron displacement platform arranged at the top; a guide rail is arranged on the lower part of the micron displacement platform and supported on the base by use of a supporting rod; a base is fixed on a displacement and rotation platform; a piezoelectric ceramic driver is arranged on the guide rail and at the lower part of the micron displacement platform; an upper objective table is arranged on the lower part of the piezoelectric ceramic driver; a micro force sensor is arranged on the base; a lower objective table is arranged on the micro force sensor; an upper slide and a lower slide are mounted on the upper objective table and the lower objective table, respectively; the upper slide and the lower slide are fixedly mounted by use of slide clamps; a sample is arranged between the upper slide and the lower slide. The SR-CR micro force loading device for detecting the micro-nano structure evolution of the material online is capable of realizing micro force loading on the material, and realizing SR-CT micro force loading for real-time in situ observation of the macromechanics parameters of the material and the characteristic structure evolution of the material at micro-nano scales.
Description
Technical field
The present invention relates to a kind of device that can realize the loading of micro-power to material, particularly relate to a kind of SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution.
Background technology
In the mechanics of materials, traditional detection and research method are only do the macro-mechanical property test of material.Method although it is so can obtain the mechanical performance data of material, but can not provide good explanation for mechanical mechanism.The destructive process of material in essence, be from microcosmic to macroscopic view across Scaling behavior.Develop multiple dimensioned Analysis of materials mechanics method, need real-time monitored material microscopic feature Evolution and macromechanics response relation thereof.Along with the development of science and technology, the research category of the mechanics of materials also develops into thin sight and even microcosmic gradually from macroscopic view.But the research of the thin sight mechanics of materials is based on theoretical research at present, and experimental biology barrier is also more rare.Therefore develop a kind of can under trickle condition the method for research material mechanical behavior and technology very necessary.
On observation technology, Synchrotron Radiation Computed Tomography technology is a kind of novel detection technique.Which overcome the shortcoming that electron microscopy can only provide the surface information of material, three-dimensional to material internal structure, harmless, real-time observation can be realized.Therefore design a set of SR-CT micro-power loading experiment platform, can directly observe macromechanics parameter and material internal Microstructure Evolution influence each other process.This can enable the research of material failure mechanism more go deep into, and then lays the foundation for disclosing the profound mechanical behavior mechanism of material, is micro-/experimental analysis platform of receiving in yardstick mechanics field.Also there is no a set of such pick-up unit at present, mainly there are following technological difficulties:
1) the mating of apparatus structure and size thereof and synchrotron radiation experimental situation; 2) how the existing enough power of assurance device loads the limit is broken sample, has again high-precision force to load step-length and high precision measuring system; 3) how to realize tiny sampler to place, clamp and precise alignment; 4) how to design support bar, under meeting rigidity enough to support the prerequisite of this device, reduce the angle be in the light as much as possible.
Summary of the invention
The object of this invention is to provide the SR-CT micro-force loading device of the on-line checkingi material micro-nano structure evolution that a kind of structure is simple, precision is high.
The object of the invention is to be achieved through the following technical solutions:
The SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution of the present invention, comprise X source and light path, image acquisition and reconstructing system, the light path of described X source is provided with drive system displacement;
Described drive system displacement comprises the micron displacement platform being located at topmost, and the bottom of described micron displacement platform is provided with guide rail, and described guide rail is by they sup-port on base, and described base is fixed on displacement and rotation platform;
Described guide rail is provided with piezoelectric ceramic actuator in the bottom of described micron displacement platform, the bottom of described piezoelectric ceramic actuator is provided with objective table, described base is provided with Micro-force sensor, described Micro-force sensor is provided with lower objective table, described upper objective table and lower objective table are equipped with micro slide and lower micro slide respectively, described upper micro slide and lower micro slide are fixedly mounted by micro slide fixture, are provided with sample between described upper micro slide and lower micro slide.
As seen from the above technical solution provided by the invention, the SR-CT micro-force loading device of the on-line checkingi material micro-nano structure evolution that the embodiment of the present invention provides, micro-power can be realized to material to load, and real-time in-situ observation material macromechanics parameter and micro-, the micro-power of the feature structure evolution SR-CT (" Synchrotron Radiation Computed Tomography " abbreviation " SR-CT ") received under yardstick loads, biomedical material can be applied to, aeronautical material, the advanced heterogeneous composite material such as nano material draws/compressive load effect under the three-dimensional of its microscopic feature evolutionary process, harmless, original position online observation and macromechanics response analysis thereof, it is micro-/experimental analysis platform of receiving in yardstick mechanics field.This device can carry out work on large-scale synchrotron radiation experiment porch and industrial μ-CT platform.
Accompanying drawing explanation
Fig. 1 is based on SR-CT Experiment Analysis System schematic diagram of the present invention;
Fig. 2 is the structural representation of drive system displacement in the embodiment of the present invention;
Fig. 3 a is the cross section structure schematic diagram of support bar in the embodiment of the present invention;
Fig. 3 b is the postrotational view of support bar in the embodiment of the present invention;
Fig. 4 be in the embodiment of the present invention sample by clamp position schematic diagram.
In figure:
1. micron displacement platform, 2. piezoelectric ceramic actuator, 3. go up objective table, 4. play objective table, 5. micro slide fixture, 6. goes up micro slide, 7. descend micro slide, 8. support bar, 9. Micro-force sensor, 10. base, 11. synchrotron radiation X-ray light beams, 12. drive system displacements, 13. displacements and rotation platform, 14.X-ray CCD, 15. disposal systems, 16. samples.
Embodiment
To be described in further detail the embodiment of the present invention below.
The SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution of the present invention, its preferably embodiment be:
Comprise X source and light path, image acquisition and reconstructing system, the light path of described X source is provided with drive system displacement;
Described drive system displacement comprises the micron displacement platform being located at topmost, and the bottom of described micron displacement platform is provided with guide rail, and described guide rail is by they sup-port on base, and described base is fixed on displacement and rotation platform;
Described guide rail is provided with piezoelectric ceramic actuator in the bottom of described micron displacement platform, the bottom of described piezoelectric ceramic actuator is provided with objective table, described base is provided with Micro-force sensor, described Micro-force sensor is provided with lower objective table, described upper objective table and lower objective table are equipped with micro slide and lower micro slide respectively, described upper micro slide and lower micro slide are fixedly mounted by micro slide fixture, are provided with sample between described upper micro slide and lower micro slide.
The cross section of described support bar adopts semi arch structure.Described micron displacement platform is provided with small stepper motor.
Described image acquisition and reconstructing system comprise X-ray CCD and disposal system.
Specific embodiment:
The SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution comprises six parts: X source and light path, drive system displacement, Micro-force sensor, sample clamping system, support bar, image acquisition and reconstructing system.Improvement of the present invention is mainly that drive system displacement, sample clamping system, support bar design three aspects.
Part I: X source and light path:
As shown in Figure 1, X ray is produced by X source, and according to fixing paths.
Part II: drive system displacement:
As shown in Figure 2, drive system displacement mainly comprise with lower component: micron displacement platform 1, piezoelectric ceramic actuator 2; By mechanical connection between each parts.
Micron displacement platform 1 is gearshift sample being applied to micron displacement magnitude.The maximum output displacement produced is about 30mm, displacement resolution 0.1 μm, maximum driving force 20N.
Piezoelectric ceramic actuator 2 is positioned on the guide rail of micron displacement platform, by being bound to the displacement micron displacement platform guide rail applying nanometer displacement magnitude to sample.The maximum output displacement about 60 μm produced, displacement resolution 1nm, maximum driving force 1000N.
Drive system displacement takes the mode of Dual Drive, is combined by micron displacement platform with piezoelectric ceramic actuator.Micron displacement platform adopts small driving stepper motor, and for coarse adjustment or pretension, piezoelectric ceramic actuator is used for precise displacement and drives.
Part III: Micro-force sensor:
As shown in Figure 2, Micro-force sensor 9 is the devices of the size measuring sample institute stress load.Dynamometry scope is ± 20N, precision 0.15%;
Part IV: sample clamping system:
As shown in Figure 2, sample clamping system comprises with lower component: objective table 3,4; Micro slide 6,7; Micro slide fixture 5;
Micro slide 6,7 is the devices for fixed sample end.Micro slide upper surface is used for fixed sample, and lower surface is arranged on objective table by screw.
Objective table 3,4 is the devices for connecting micro slide and drive system displacement, Micro-force sensor.
Micro slide fixture 5 is for fixing two pieces of micro slides and keeping its relative position to fix.Micro slide with micro slide fixture is installed to objective table, and upper and lower micro slide relative position in installation process can be kept to fix, and avoids sample to be destroyed.Micro slide fixture is dismantled after installation.
Part V: support bar:
As shown in Figure 2, support bar 8 is for connecting displacement drive above and base below.
Support bar uses semi arch design as shown in Figure 3, making it when being applied to Synchrotron Radiation Computed Tomography experiment, can gather image in the anglec of rotation of 120 degree.
Part VI: image acquisition and reconstructing system:
As shown in Figure 1, image acquisition and reconstructing system comprise X-ray CCD, disposal system.X-ray CCD can receive the synchrotron radiation X-ray from right side outgoing and be converted into digital signal; Disposal system can reconstruct specimen material inside, three-dimensional microstructure appearance figure.
Based on technique scheme, machinery of the present invention always scheme and based on the SR-CT Experiment Analysis System of this invention as shown in Fig. 2 and Fig. 1.At present, based on this cover test platform, successfully achieve carbon fibre composite under tensile force effect, resolution is the Synchrotron Radiation Computed Tomography online observation of 0.19 μm.
Advantage of the present invention and good effect are:
A set of research is provided to draw/compression experiment device across yardstick mechanics SR-CT is miniature, it effectively can overcome the shortcoming of traditional experiment observation technology, realize under Tensile or Compressive Loading effect, to the advanced materials such as biomaterial, aeronautical material, nano material micro-, receive mesostructure Morphology Evolution and macromechanics response thereof and carry out three-dimensional, the observation and analysis that harmless, original position is online.The present invention provides strong technical support by for mechanical function mechanism between further investigation material macro-mechanical characters and micromechanism and evolutionary process thereof.
The principle of work of concrete enforcement is:
As shown in Figure 1, comprise when the present invention specifically implements with lower part: X source and light path, drive system displacement, Micro-force sensor, sample clamping system, image acquisition and reconstructing system.Each several part specific implementation process and embodiment as follows:
One, X source and light path:
In testing process, X ray penetrates from right side penetrate sample after a series of optical element after, then receives imaging by X-ray CCD.In specific implementation process, X ray can have synchrotron radiation light source and X-ray production apparatus to produce, and its beam type includes but not limited to collimated beam and fladellum etc.;
Two, drive system displacement:
Drive system displacement mainly comprise a micron displacement platform, piezoelectric ceramic actuator drives two parts.Drive system displacement on the one hand needs high-precision displacement step-length, and tiny sampler is when being positioned over micro slide on the other hand, when can there is bending situation, as shown in Figure 4, or has space and undertighten when miscellaneous part binding site and needs enough strokes.Therefore, drive system takes the mode of Dual Drive, combine with piezoelectric ceramic actuator by micron displacement platform.Micron displacement platform adopts small driving stepper motor, and for coarse adjustment or pretension, piezoelectric ceramic actuator is used for precise displacement and drives.During concrete enforcement, when needs produce applying power load to tiny sampler, first regulate micron precision surface plate, sample space that is stretching or junction is disappeared, and then utilizes piezoelectric ceramic actuator to apply power load to sample.
Three, Micro-force sensor:
Micro-force sensor can the size of real-time and high-precision monitoring sample institute stress load.During concrete enforcement, installing sample needs the sample institute of monitoring in real time stress load, prevents sample damaged by larger load in installation process.After sample loads, need to regulate drive system displacement to produce displacement according to Micro-force sensor reading, make load suffered by sample maintain steady state value.
Four, sample clamping system:
Sample clamping system comprises objective table, micro slide, micro slide fixture.Objective table, micro slide.Micro slide fixture
Concrete implement time sample placement and alignment completed by following steps:
1. micro slide is put into the corresponding position of micro slide framework, tighten screw;
2. micro slide framework is placed on warm table, is heated to 130 DEG C;
3. with tweezers, sample is placed in groove, paraffin is spread upon in the groove of micro slide;
4. be cooled to room temperature, paraffin solidifies;
After above step, with screw, micro slide is fixed on the objective table of force loading device, then unclamps the screw on micro slide framework, take off framework.
Five, image acquisition and reconstructing system:
Image acquisition and reconstructing system are made up of X-ray CCD, disposal system.In specific implementation process, received from the synchrotron radiation light of right side injection by X-ray CCD after penetrating sample, and be stored on hard disc of computer, then utilize disposal system to obtain the three-dimensional microstructures shape appearance figure of the specimen material in each moment, thus realize drawing/compressive load under the three-dimensional of material, harmless, real-time in-situ detection.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (4)
1. a SR-CT micro-force loading device for on-line checkingi material micro-nano structure evolution, comprise X source and light path, image acquisition and reconstructing system, it is characterized in that, the light path of described X source is provided with drive system displacement;
Described drive system displacement comprises the micron displacement platform (1) being located at topmost, the bottom of described micron displacement platform (1) is provided with guide rail, described guide rail is supported on base (10) by support bar (8), and described base is fixed on displacement and rotation platform;
Described guide rail is provided with piezoelectric ceramic actuator (2) in the bottom of described micron displacement platform (1), the bottom of described piezoelectric ceramic actuator (2) is provided with objective table (3), the upper described micron displacement platform (1) of described base (10) is provided with Micro-force sensor (9), described Micro-force sensor (9) is provided with lower objective table (4), described upper objective table (3) and lower objective table (4) are equipped with micro slide (6) and lower micro slide (7) respectively, described upper micro slide (6) and lower micro slide (7) are fixedly mounted by micro slide fixture (5), sample is provided with between described upper micro slide (6) and lower micro slide (7).
2. the SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution according to claim 1, is characterized in that, the cross section of described support bar (8) adopts semi arch structure.
3. the SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution according to claim 2, is characterized in that, described micron displacement platform (1) is provided with small stepper motor.
4. the SR-CT micro-force loading device of the on-line checkingi material micro-nano structure evolution according to claim 1,2 or 3, it is characterized in that, described image acquisition and reconstructing system comprise X-ray CCD and disposal system.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764757A (en) * | 2015-04-03 | 2015-07-08 | 燕山大学 | Real-time X-ray imaging system with micro scanning |
| CN106053237A (en) * | 2016-08-10 | 2016-10-26 | 山东大学 | Seismic oscillation simulation testing machine for macroscopic and microscopic damage joint tracking of rock mass and method thereof |
| CN107014841A (en) * | 2017-05-25 | 2017-08-04 | 中国科学技术大学 | A kind of SR CT mechanical test systems and SR CT mechanical test methods |
| CN108195671A (en) * | 2017-12-11 | 2018-06-22 | 中国科学院力学研究所 | A kind of pulling pressing device in situ based on computed tomography |
| CN111077014A (en) * | 2020-03-11 | 2020-04-28 | 南京航空航天大学 | Micro-CT in-situ loading device and testing method for microscopic damage of ceramic matrix composite |
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| CN204495648U (en) * | 2014-11-13 | 2015-07-22 | 中国科学技术大学 | A kind of SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution |
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- 2014-11-13 CN CN201410640378.8A patent/CN104330308A/en active Pending
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| CN204495648U (en) * | 2014-11-13 | 2015-07-22 | 中国科学技术大学 | A kind of SR-CT micro-force loading device of on-line checkingi material micro-nano structure evolution |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764757A (en) * | 2015-04-03 | 2015-07-08 | 燕山大学 | Real-time X-ray imaging system with micro scanning |
| CN106053237A (en) * | 2016-08-10 | 2016-10-26 | 山东大学 | Seismic oscillation simulation testing machine for macroscopic and microscopic damage joint tracking of rock mass and method thereof |
| CN107014841A (en) * | 2017-05-25 | 2017-08-04 | 中国科学技术大学 | A kind of SR CT mechanical test systems and SR CT mechanical test methods |
| CN108195671A (en) * | 2017-12-11 | 2018-06-22 | 中国科学院力学研究所 | A kind of pulling pressing device in situ based on computed tomography |
| CN111077014A (en) * | 2020-03-11 | 2020-04-28 | 南京航空航天大学 | Micro-CT in-situ loading device and testing method for microscopic damage of ceramic matrix composite |
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Application publication date: 20150204 |