CN109323904B - Sample preparation method and device for testing retention rate of high-temperature strength of fiber bundle filaments - Google Patents
Sample preparation method and device for testing retention rate of high-temperature strength of fiber bundle filaments Download PDFInfo
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- CN109323904B CN109323904B CN201811379202.6A CN201811379202A CN109323904B CN 109323904 B CN109323904 B CN 109323904B CN 201811379202 A CN201811379202 A CN 201811379202A CN 109323904 B CN109323904 B CN 109323904B
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 29
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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Abstract
The invention relates to a sample preparation method and a sample preparation device for testing the retention rate of high-temperature strength of fiber bundle yarns, and belongs to the technical field of material testing. The sample preparation device comprises a frame, two groups of fiber fastening components and two fastening pressing sheets, wherein each group comprises at least three fiber fastening components arranged side by side, one group of fiber fastening components are arranged on a first frame of the frame and are used for being in one-to-one correspondence with fiber bundles to be detected so as to fix the first end of the fiber bundles to be detected, the other group of fiber fastening components are arranged on a second frame opposite to the first frame and are used for being in one-to-one correspondence with the fiber bundles to be detected so as to fix the second end of the fiber bundles to be detected, the two fastening pressing sheets are respectively fixed on the first frame and the second frame and are positioned between the two groups of fiber fastening components so as to compress the fiber bundles to be detected. The invention keeps the fiber bundle to be tested in a tense state all the time in the heat treatment process, and avoids the test result dispersion caused by the bending deformation of the fiber at high temperature.
Description
Technical Field
The invention belongs to the technical field of material testing, and particularly relates to a sample preparation method and a sample preparation device for testing the retention rate of high-temperature strength of a fiber bundle.
Background
Silicon carbide fiber is a reinforcement of high-performance ceramic matrix composite material which is formed in the 80 th century. Compared with other high-performance fibers such as carbon fibers and oxide fibers, the silicon carbide fibers have excellent performances such as low density, high temperature resistance, irradiation resistance, long-term oxidation resistance of a body, scouring resistance, high strength and the like, and have wide application value in the fields of thermal protection systems of aerospace vehicles, nuclear fuel cladding of nuclear fission reactors, first wall materials of nuclear fusion reactors and the like.
As a high-temperature resistant material, the strength retention rate of the silicon carbide fiber in a high-temperature environment is one of the most important performance indexes. But relevant test standards are lacked for a long time, and the strength retention rate of the silicon carbide fiber monofilaments in a high-temperature environment has a national standard GB/T34520.7-2017 until 2017. The method generally comprises the steps of placing the silicon carbide fiber in a free state in a high-temperature furnace for heat treatment, and taking out the monofilament after the heat treatment for testing the high-temperature strength retention rate.
However, since the silicon carbide fiber has the characteristics of hardness and brittleness, the carbon fiber bundle placed in a free state is easy to bend irreversibly after heat treatment, and if the silicon carbide fiber is used for evaluating the high-temperature strength retention rate of the fiber bundle yarn or the monofilament, the test result is greatly dispersed, and the fiber is easy to damage in the subsequent sample preparation process, so that the test result is distorted. On the other hand, from the application angle of the silicon carbide fiber, the mechanical property of the fiber bundle has more practical reference significance, but at present, no standard and method for testing the retention rate of the high-temperature strength of the silicon carbide fiber bundle exists in China.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a sample preparation method and a sample preparation device for testing the retention rate of the high-temperature strength of a fiber bundle.
In order to achieve the above purpose, the invention provides the following technical scheme:
the sample preparation device for testing the retention rate of the high-temperature strength of the fiber bundle filaments is characterized by comprising a frame, two groups of fiber fastening components and two fastening pressing sheets, wherein each group comprises at least three fiber fastening components arranged side by side, one group of the fiber fastening components is arranged on a first frame of the frame and is used for corresponding to the fiber bundle filaments to be tested one by one so as to fix a first end of the fiber bundle filaments to be tested, the other group of the fiber fastening components is arranged on a second frame opposite to the first frame and is used for corresponding to the fiber bundle filaments to be tested one by one so as to fix a second end of the fiber bundle filaments to be tested, and the two fastening pressing sheets are respectively fixed on the first frame and the second frame and are positioned between the two groups of the fiber fastening components so as to press the fiber bundle filaments to be tested.
In an optional embodiment, the sample preparation device for testing the retention rate of the high-temperature strength of the fiber bundle filament further comprises two groups of pressing sheet fastening assemblies, wherein the two groups of pressing sheet fastening assemblies are respectively used for fixing the two fastening pressing sheets, and each pressing sheet fastening assembly comprises a pressing sheet fastening piece and a matched nut.
In an alternative embodiment, the fiber fastening assembly includes a fiber fastener and a mating nut.
In an alternative embodiment, the fiber fastener is 5-15mm in diameter.
In an optional embodiment, the distance between the first frame and the second frame is 80-300 mm.
In an optional embodiment, the sample preparation device is made of graphite or Al2O3，ZrO2Or SiC material.
In an alternative embodiment, the fastening squash has a width of 5-30mm and a thickness of 2-12 mm.
In an alternative embodiment, the thickness of the rim is 6-15 mm.
In an optional embodiment, the sample preparation device for testing the retention rate of the high-temperature strength of the fiber bundle filaments further comprises a suspension bracket, wherein a suspension assembly is arranged on the suspension bracket and used for suspending and fixing the frame to enable the fixed fiber bundle to be tested to be in a vertical state.
A sample preparation method for testing the retention rate of high-temperature strength of fiber bundle yarns comprises the following steps:
(1) fixing at least three fiber bundles to be tested by a sample preparation device, wherein the sample preparation device is provided by any one of claims 1-8;
(2) after the fiber bundle wires to be detected fixed on the sample preparation device are subjected to heat treatment, soaking the sample preparation device fixed with the fiber bundle to be detected in resin glue solution for impregnation, and curing after the impregnation;
(3) and (3) intercepting the fiber bundle yarn to be detected obtained in the step (2) to obtain a sample.
In an alternative embodiment, the fiber fastening assembly of step (1) comprises a fiber fastener and a mating nut.
In an optional embodiment, the fixing at least three fiber bundles to be tested by the sample preparation device in step (1) includes:
the fiber bundle wires to be tested are fixed through the fiber fasteners, the fiber fasteners and the nuts are matched and screwed to fix the frame, and continuous screwing allowance is reserved during screwing.
In an optional embodiment, the step (2) of immersing the sample preparation device with the fiber bundle to be tested fixed therein in a resin glue solution for immersion further includes:
and taking down the fastening pressing sheet, tightening the loose fiber bundle to be tested by rotating the fiber fastening piece, and then reinstalling the fastening pressing sheet.
In an optional embodiment, the step (2) of immersing the sample preparation device with the fiber bundle to be tested fixed in the resin glue solution for impregnation includes:
and (3) immersing the sample preparation device fixed with the fiber bundle to be detected into epoxy resin glue solution for immersion for 1-10 min, taking out, shaking to take out redundant glue beads, and airing.
In an alternative embodiment, the curing in step (2) comprises:
and vertically hanging the sample preparation device fixed with the fiber bundle to be detected on a suspension bracket, and drying at the temperature of 100-180 ℃ for 30-150min to realize solidification.
The invention has the following beneficial effects:
(1) according to the sample preparation device for testing the high-temperature strength retention rate of the fiber bundle, provided by the embodiment of the invention, two ends of at least three fibers to be tested are respectively fixed on two opposite sides of the frame, and the fiber bundle to be tested is pressed tightly through the fastening pressing sheet, so that the fiber bundle to be tested is always kept in a tight state in the heat treatment process, and the dispersion of the test result caused by the irreversible bending deformation of the fibers at high temperature is avoided;
(2) meanwhile, after the heat treatment of the fibers is finished, at least three fiber bundles to be tested can be simultaneously impregnated into the resin through the device for sample preparation, so that the fibers are prevented from being damaged in the sample preparation process, and the test precision and the sample preparation efficiency are improved;
(3) through carrying out secondary tightening operation on the fiber bundle yarn after heat treatment, the damage of the fiber bundle yarn sample in the dipping and curing process is greatly reduced, and the accuracy of the test result is ensured.
Drawings
Fig. 1 is a schematic view of a sample preparation device (without a suspension bracket) fixed with a fiber bundle to be tested according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a sample preparation device (with a suspension bracket) fixed with a fiber bundle to be tested according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention will be made with reference to the accompanying drawings and specific examples.
Referring to fig. 1, an embodiment of the present invention provides a sample preparation device for testing a retention rate of a high temperature strength of a fiber bundle, including a frame 2, two sets of fiber fastening components 3 and two fastening pressing sheets 4, each set including at least three fiber fastening components 3 arranged side by side, wherein one set of the fiber fastening components 3 is arranged on a first frame (an upper frame shown in fig. 1) of the frame 2, and is configured to correspond to a fiber bundle to be tested 1 one by one to fix a first end of the fiber bundle to be tested 1, the other set of the fiber fastening components 3 is arranged on a second frame (a lower frame shown in fig. 1) opposite to the first frame, and is configured to correspond to the fiber bundle to be tested 1 one by one to fix a second end of the fiber bundle to be tested 1, the two fastening pressing sheets 4 are respectively fixed on the first frame and the second frame, and are located between the two sets of the fiber fastening components, so as to compact the fiber bundle 1 to be measured.
Specifically, in the embodiment of the present invention, the fastening pressing sheet may be fixed on the frame by means of fastening members, such as connection, adhesion, or joggle, but the present invention is not limited thereto, and in order to facilitate detachment and adjustment of the degree of compression, as shown in fig. 1, it is preferable that the fastening pressing sheet is connected with a pressing sheet fastening assembly combined with a mating nut by a fastening member 5, such as a screw, a screw rod, or a bolt; the fiber to be measured can be fixed on the fiber fastening component in the modes of buckling, winding, bonding and the like, but the invention is not limited, and preferably, the fiber to be measured is wound and fixed; the fiber bundle filament to be detected can be various fibers such as silicon carbide fiber, carbon fiber and the like, and preferably silicon carbide fiber.
According to the sample preparation device for testing the high-temperature strength retention rate of the fiber bundle, provided by the embodiment of the invention, two ends of at least three fibers to be tested are respectively fixed on two opposite sides of the frame, and the fiber bundle to be tested is pressed tightly through the fastening pressing sheet, so that the fiber bundle to be tested is always kept in a tight state in the heat treatment process, and the dispersion of the test result caused by the bending deformation of the fibers at high temperature is avoided; meanwhile, after the heat treatment of the fibers is finished, at least three fibers to be tested can be simultaneously impregnated into the resin through the device for sample preparation, so that the fibers are prevented from being damaged in the sample preparation process, and the test precision and the sample preparation efficiency are improved.
In an optional embodiment, the fiber fastening assembly comprises a fiber fastening piece and a matched nut, when the fiber bundle wire to be detected is fixed, the fiber bundle wire to be detected can be wound and fixed on the fiber fastening piece, and the effective length of the fiber bundle wire to be detected can be conveniently adjusted by screwing the fiber fastening piece.
In an alternative embodiment, the fiber fastener is 5-15mm in diameter.
The size of the fastener can avoid the problems that the fiber bundle wires to be measured are easy to unwind and loose during heat treatment and have high operation difficulty during fiber winding, and can also avoid unnecessary fiber waste during fiber winding.
In an optional embodiment, the distance between the first frame and the second frame is 80-300 mm. Specifically, as shown in fig. 1, in the embodiment of the present invention, a distance between the first frame and the second frame refers to a length of a hollow area between the upper frame and the lower frame in a vertical direction. The distance can ensure that the length of the sample meets the requirement of the fiber bundle filament stretching gauge length, and can also avoid the problem of low testing performance caused by easy bending and deformation after fiber is impregnated with resin in the sample preparation process due to overlong suspended part of the fiber.
In an alternative embodiment, the sample preparation device is preferably Al2O3，ZrO2SiC and other materials which are high temperature resistant and are not easy to react with the silicon carbide fiber in the air environment; when the material is used in a vacuum environment or an inert gas protection environment, the material includes but is not limited to graphite and Al2O3，ZrO2And the like which are resistant to high temperature and are not easy to react with the silicon carbide fibers.
In an alternative embodiment, the fastening squab 4 has a width of 5-30mm and a thickness of 2-12 mm.
If the width of the fastening pressing sheet is less than 5mm, the fastening effect is poor; if the width is more than 30mm, the fiber bundle is wasted. If the thickness of the fastening pressing sheet is less than 2mm, the fastening effect is poor; if the width is larger than 12mm, the difficulty of the fastening operation is increased.
In an alternative embodiment, the thickness of the rim is 6-15 mm.
If the thickness of the frame is less than 6mm, the frame is easy to deform in the high-temperature heat treatment process; if the thickness exceeds 15mm, the frame is too heavy to be handled.
As shown in fig. 2, in an alternative embodiment, the sample preparation device for testing the retention rate of the high-temperature strength of the fiber bundle further includes a suspension bracket 6, and a suspension assembly 7 is disposed on the suspension bracket 6 and used for suspending and fixing the frame 2 so that the fixed fiber bundle to be tested is in a vertical state.
The embodiment of the invention also provides a sample preparation method for testing the retention rate of the high-temperature strength of the fiber bundle filaments, which is characterized by comprising the following steps of:
(1) fixing at least three fiber bundles to be tested by a sample preparation device, wherein the sample preparation device is provided by the device embodiment, and specific description and effects refer to the device embodiment and are not repeated herein;
in an optional embodiment, a fiber bundle wire to be tested is wound on a screw rod of a fiber fastening bolt, tension is applied to the fiber bundle by rotating the fiber fastening bolt to ensure that the fiber bundle to be tested is tightened, and after all the fiber bundles to be tested are sequentially wound on the fiber fastening bolt to be tightened, two fastening pressing sheets are pressed at two ends of the fiber bundle and are tightened through pressing sheet bolts. Further, when the fiber fastening bolt is matched with the nut to be screwed down to realize the fixation with the frame, a continuous screwing allowance is reserved so that the fiber length can be adjusted again after the heat treatment;
(2) after the fiber bundle to be detected fixed on the sample preparation device is subjected to heat treatment, soaking the sample preparation device fixed with the fiber bundle yarn to be detected in resin glue solution for impregnation, and curing after the impregnation;
specifically, the heat treatment can be performed in a high-temperature furnace, and can be an oxidation environment, a vacuum environment or an inert gas protection environment; during heat treatment, the high-temperature heat treatment furnace is heated to the preset heat treatment process temperature (an oxidation environment: 400-. Taking out the device after the temperature preservation and cooling to room temperature;
in an optional embodiment, after heat treatment, the two fastening pressing sheets 4 are taken down, the loose fiber bundle to be tested is tightened by rotating the fiber fastening bolt, then the fastening pressing sheets 4 are installed again to realize secondary tightening, and the secondary tightening operation is performed on the fiber bundle after heat treatment, so that the damage of the fiber bundle sample in the dipping and curing process is greatly reduced, and the accuracy of the test result is ensured;
in an optional embodiment, the device after the secondary tightening of the fiber is placed in a container filled with epoxy resin glue solution, the fiber bundle is ensured to be completely immersed in the epoxy resin glue solution for 1-10 min, the fiber bundle is taken out, the device is slightly vibrated to remove the redundant glue beads, then the fiber bundle is vertically hung on a hanging bracket 5 to be dried at room temperature, and the drying and curing are carried out in an oven, preferably the drying is carried out at 100-180 ℃ for 30-150min to realize the curing.
(3) And (3) intercepting the fiber bundle to be detected obtained in the step (2) to obtain a sample.
The following is a specific embodiment of the present invention:
the embodiment provides a sample preparation method for testing the retention rate of high-temperature strength of fiber bundle yarns, which comprises the following steps of:
1) the silicon carbide fiber bundle wire to be tested is wound on a sample preparation device, and the sample preparation device comprises a frame 2, 18 fiber fastening bolts, 4 pressing sheet fastening bolts and a suspension bracket 6, wherein the number of the pressing sheets is two, and the illustration is shown in figure 1. The fiber fastening bolt is slightly rotated and fixed on the frame 2, and a margin for continuously screwing is reserved. And winding the silicon carbide fiber bundle to be tested on a screw rod of the fiber fastening bolt for more than 4 circles, and applying tension to the fiber bundle by rotating the fiber fastening bolt to ensure that the silicon carbide fiber bundle to be tested is tight. And sequentially winding 9 silicon carbide fiber bundles to be tested on the fiber fastening bolts for tightening, pressing the two fastening pressing sheets 4 at two ends of the fiber bundles and screwing the two fastening pressing sheets through the pressing sheet fastening bolts. The suspension bracket 6 in the sample preparation device is made of stainless steel, and other parts are made of graphite. The frame 2 in the sample preparation apparatus had dimensions 385mm by 200 mm. Wherein the silicon carbide fiber bundle to be measured is parallel to the length direction of 385 mm. The width of the fastening pressing sheet 4 in the sample preparation device is 12mm, the thickness is 5mm, and the diameter of the fiber fastening bolt is 8 mm.
2) And (3) placing the sample preparation device wound with the silicon carbide fiber bundle wires to be detected into a high-temperature atmosphere furnace for heat treatment, wherein the sample preparation device is placed in a constant-temperature area in the high-temperature furnace during treatment. The temperature in a hearth of a furnace is increased from room temperature to 1250 ℃ by introducing high-purity argon with the purity of 99.999 percent into the furnace body, and the temperature increasing rate is set at 10 ℃/min. Keeping the temperature at 1250 ℃ for 1 hour, cooling to below 60 ℃ along with the furnace, taking out, and placing in a dryer to cool to room temperature. And taking out the sample preparation device after the temperature preservation is finished and the sample preparation device is cooled to room temperature.
3) The fiber bundle may become loose due to the fact that the sizing agent on the surface of the fiber bundle has been volatilized after the heat treatment and there is a difference in thermal expansion coefficient between the fiber and the sample preparation device. And taking down the two fastening pressing sheets 4 on the sample preparation device after heat treatment, and secondarily tightening the silicon carbide fiber bundle to be tested which is loosened after heat treatment by adjusting the fiber fastening bolt. And after tightening all the silicon carbide fiber bundles to be tested for the second time, pressing the two fastening pressing sheets 4 at the two ends of the fiber bundle wires and screwing the pressing sheet fastening bolts.
4) And (3) putting the sample preparation device subjected to secondary tensioning into a stainless steel container filled with epoxy resin glue solution, ensuring that the silicon carbide fiber bundle wires are completely immersed in the epoxy resin glue solution, immersing for 5min, taking out, slightly vibrating the sample preparation device, removing redundant rubber beads, and vertically hanging on a hanging bracket 6 to dry at room temperature. The hanging bracket 6 with the sample preparation device hung thereon is pushed into an oven for curing, and dried at 120 ℃ for 120 min.
5) And closing the drying box, taking out the dried silicon carbide fiber bundle to be tested, naturally cooling, and intercepting the silicon carbide fibers between the two fastening pressing sheets 4 after cooling to room temperature to obtain 9 prepared samples.
The mechanical properties of the silicon carbide fiber bundle obtained by the test of the invention after heat treatment at 1250 ℃ are compared with the mechanical properties of the fiber monofilament obtained by the test according to the national standard GB/T34520.7-2017 after heat treatment at 1250 ℃ (the fibers obtained by the test of the two methods are products on the same fiber shaft).
As can be seen from the results, the discreteness of the results obtained by the method is lower, and the strength retention rate is higher, which shows that the method provided by the invention has less damage to the fibers, and the results are closer to the real mechanical strength of the fibers.
The above description is only one embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
The invention has not been described in detail in part of the common general knowledge of those skilled in the art.
Claims (13)
1. A sample preparation device for testing the retention rate of high-temperature strength of a fiber bundle wire is disclosed, wherein the fiber bundle wire is a silicon carbide fiber bundle wire or a carbon fiber bundle wire, it is characterized by comprising a frame, two groups of fiber fastening components and two fastening pressing sheets, wherein each group comprises at least three fiber fastening components arranged side by side, wherein one group of the fiber fastening components are arranged on the first frame of the frame and are used for corresponding to the fiber bundles to be tested one by one, so as to fix the first end of the fiber bundle to be tested, and the other group of the fiber fastening components is arranged on a second frame opposite to the first frame, the two fastening pressing sheets are respectively fixed on the first frame and the second frame and positioned between the two groups of fiber fastening components so as to tightly press the fiber bundle to be tested;
the sample preparation device further comprises two groups of pressing sheet fastening assemblies which are respectively used for fixing the two fastening pressing sheets, and each pressing sheet fastening assembly comprises a pressing sheet fastening piece and a matched nut.
2. The sample preparation device for the fiber bundle filament high-temperature strength retention test according to claim 1, wherein the fiber fastening component comprises a fiber fastening piece and a matched nut.
3. The sample preparation device for the fiber bundle filament retention rate test according to claim 2, wherein: the fiber fastener has a diameter of 5-15 mm.
4. The sample preparation device for the fiber bundle filament retention rate test according to claim 1, wherein the distance between the first frame and the second frame is 80-300 mm.
5. The sample preparation device for the fiber bundle filament high-temperature strength retention rate test according to claim 1, wherein the sample preparation device is graphite or Al2O3，ZrO2Or SiC material.
6. The sample preparation device for the fiber bundle filament high-temperature strength retention rate test according to claim 1, wherein the fastening pressing sheet has a width of 5-30mm and a thickness of 2-12 mm.
7. The sample preparation device for the fiber bundle filament high-temperature strength retention rate test according to claim 1, wherein the thickness of the frame is 6-15 mm.
8. The sample preparation device for the fiber bundle high-temperature strength retention rate test according to claim 1, further comprising a suspension bracket, wherein the suspension bracket is provided with a suspension component for suspending and fixing the frame so as to enable the fixed fiber bundle to be tested to be in a vertical state.
9. A sample preparation method for testing the retention rate of high-temperature strength of fiber bundle filaments is characterized by comprising the following steps:
(1) fixing at least three fiber bundles to be tested by a sample preparation device, wherein the sample preparation device is provided by any one of claims 2 or 3;
(2) after the fiber bundle to be detected fixed on the sample preparation device is subjected to heat treatment, taking down the fastening pressing sheet, tightening the loosened fiber bundle to be detected by rotating the fiber fastening piece, and then reinstalling the fastening pressing sheet; the fiber bundle wire to be detected is a silicon carbide fiber bundle wire or a carbon fiber bundle wire;
(3) immersing the sample preparation device fixed with the fiber bundle yarn to be detected into resin glue solution for impregnation, and curing after impregnation;
(4) and (4) intercepting the fiber bundle yarn to be detected obtained in the step (3) to obtain a sample.
10. The method as claimed in claim 9, wherein the fiber fastening assembly of step (1) comprises a fiber fastening member and a mating nut.
11. The sample preparation method for testing the retention rate of the high-temperature strength of the fiber bundle filament according to claim 10, wherein the step (1) of fixing at least three fiber bundles to be tested by the sample preparation device comprises:
the fiber bundle to be tested is fixed through the fiber fastener, the fiber fastener is matched with the nut to be screwed up to realize the fixation of the frame, and a continuous screwing allowance is reserved during screwing.
12. The sample preparation method for the fiber bundle filament retention rate test according to claim 9, wherein the step (3) of immersing the sample preparation device with the fiber bundle filament to be tested fixed in the resin glue solution for impregnation comprises:
and (3) immersing the sample preparation device fixed with the fiber bundle to be detected into epoxy resin glue solution for immersion for 1-10 min, taking out, shaking to take out redundant glue beads, and airing.
13. The sample preparation method for testing the retention rate of the fiber bundle filament at high temperature according to claim 12, wherein the curing in the step (3) comprises:
and vertically hanging the sample preparation device fixed with the fiber bundle to be detected on a suspension bracket, and drying at the temperature of 100-180 ℃ for 30-150min to realize solidification.
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| WO2012173963A1 (en) * | 2011-06-13 | 2012-12-20 | Angus Chemical Company | Devices and methods for evaluating hair fixative compositions |
| CN104122202A (en) * | 2014-07-29 | 2014-10-29 | 厦门大学 | Method for testing interfacial bonding strength of ceramic fiber-reinforced resin matrix composite material |
| CN204188438U (en) * | 2014-11-17 | 2015-03-04 | 卡本复合材料（天津）有限公司 | A kind of carbon fibre precursor detection sample preparation device |
| CN104942743A (en) * | 2015-06-28 | 2015-09-30 | 浙江康盈磁业有限公司 | Tensioning device and tensioning method |
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| WO2012173963A1 (en) * | 2011-06-13 | 2012-12-20 | Angus Chemical Company | Devices and methods for evaluating hair fixative compositions |
| CN104122202A (en) * | 2014-07-29 | 2014-10-29 | 厦门大学 | Method for testing interfacial bonding strength of ceramic fiber-reinforced resin matrix composite material |
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| CN104942743A (en) * | 2015-06-28 | 2015-09-30 | 浙江康盈磁业有限公司 | Tensioning device and tensioning method |
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