CN112525722A - Preparation method of silicon carbide ceramic clamp for metal creep test - Google Patents
Preparation method of silicon carbide ceramic clamp for metal creep test Download PDFInfo
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- CN112525722A CN112525722A CN202011227162.0A CN202011227162A CN112525722A CN 112525722 A CN112525722 A CN 112525722A CN 202011227162 A CN202011227162 A CN 202011227162A CN 112525722 A CN112525722 A CN 112525722A
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- pull rod
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- clamping cushion
- clamping
- silicon carbide
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
Abstract
The invention relates to a preparation method of a silicon carbide ceramic clamp for a metal creep test, which comprises an upper pull rod, a middle connecting module, a lower pull rod, a clamping cushion block for a sheet-shaped plate sample and a clamping cushion block for a cylindrical step sample; the process flow for manufacturing each part of the silicon carbide ceramic clamp comprises the steps of preparing a fiber prefabricated part, preparing a prefabricated part coating, performing Chemical Vapor Infiltration (CVI) treatment on the prefabricated part, performing precursor impregnation cracking (PIP) treatment, performing Chemical Vapor Infiltration (CVI) densification treatment on a part, performing heat treatment on the part, machining and the like; the silicon carbide ceramic clamp has excellent ablation resistance, heat crack resistance and oxidation resistance, light weight, high coaxiality and long service life, can be properly matched with the existing endurance testing machine and a high-temperature furnace in the shape size and structural form, and can provide hardware guarantee for the ultrahigh-temperature endurance creep performance test at the temperature of more than 1500 ℃.
Description
Technical Field
The invention discloses a preparation method of a silicon carbide ceramic clamp for a metal creep rupture test, and belongs to the technical field of material mechanical property testing.
Background
The metal material can generate a creep phenomenon under the action of certain temperature and stress, the creep phenomenon of the material is more and more non-negligible along with the higher and more high requirement of a novel engine on the working temperature of the high-temperature metal material, and the research on the creep phenomenon of the material has important significance for the development of the design work of devices such as boilers, internal combustion engines, gas turbines, nuclear reactors and the like which need to work at high temperature for a long time.
The development of a creep test of a metal material requires a heating device to provide a stable high-temperature environment for a sample for a long time. The development of a new generation of silicon carbide ceramic clamp for the creep rupture test, which can be used in an ultrahigh temperature environment of more than 1500 ℃, can provide help for the deep exploration of the creep rupture test work.
Disclosure of Invention
The invention provides a preparation method of a silicon carbide ceramic clamp for a metal creep test, which is designed and provided aiming at the prior art situation, and aims to develop the silicon carbide ceramic clamp for the metal creep test, which can be used in an ultrahigh temperature environment of more than 1500 ℃, so that the clamp has excellent ablation resistance, thermal cracking resistance and oxidation resistance, and can be properly matched with the prior endurance testing machine and a high-temperature furnace in the aspects of external dimension and structural form.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a preparation method for silicon carbide ceramic anchor clamps for metal creep test, this silicon carbide ceramic anchor clamps can be used for the lasting creep test of the high temperature more than 1500 degrees centigrade of metal material, and this silicon carbide ceramic anchor clamps include upper portion pull rod 1, intermediate junction module 2, lower part pull rod 3, be used for the centre gripping cushion 4 of lamellar plate sample and be used for the centre gripping cushion 5 of cylindric ladder sample, the low temperature end of upper portion pull rod 1 and lower part pull rod 3 is connected fixedly through pin and lasting creep test machine respectively, and the high temperature end is connected fixedly through centre gripping cushion and sample, its characterized in that:
the clamping cushion block 4 for the sheet-shaped plate sample is used for a creep test of the plate sample, an isosceles trapezoid groove in the clamping cushion block is used for being connected and fixed with the sample, and a circular table surface on the outer side of the clamping cushion block is used for being connected and fixed with the grooves in the high-temperature ends of the upper pull rod 1 and the lower pull rod 3;
the clamping cushion block 5 for the cylindrical step sample is used for a creep test of the bar sample, a double-layer cylindrical groove in the clamping cushion block is used for being connected and fixed with the sample, and a circular table surface on the outer side of the clamping cushion block is used for being connected and fixed with the grooves in the high-temperature ends of the upper pull rod 1 and the lower pull rod 3;
the two ends of the middle connecting module 2 are provided with truncated cone-shaped slots, the two samples can be connected and fixed through the clamping cushion blocks, and meanwhile, the two samples are fed into the furnace for a creep test;
the preparation of the upper pull rod 1, the middle connecting module 2, the lower pull rod 3, the clamping cushion block 4 for the sheet-shaped plate sample and the clamping cushion block 5 for the cylindrical step sample comprises fiber prefabricated part preparation, prefabricated part coating preparation, prefabricated part chemical vapor infiltration treatment, precursor impregnation cracking treatment, part chemical vapor infiltration densification treatment, part heat treatment and machining.
In one implementation, the upper pull rod 1 and the lower pull rod 3 are identical in shape and structure, the low-temperature section of the upper pull rod is cylindrical, two cylindrical pin holes 11 are formed in the low-temperature section, the transition section is in a side-cutting circular truncated cone shape with gradually increased sectional area, the high-temperature section is in a square column shape with edges being ground into round corners, a square through hole I12 is formed in the high-temperature section, and a circular truncated cone-shaped groove I13 is formed between the square through hole I12 and the bottom surface of the high-temperature section to hang a sample through a clamping cushion.
In one implementation, the middle connection module 2 is a cube, a square through hole ii 21 is formed in the middle, and a truncated cone-shaped groove ii 22 is formed between two bottom surfaces of the square through hole ii 21 to connect two samples simultaneously in one test through a clamping cushion block.
In one implementation, the clamping cushion blocks 4 for the sheet-like plate samples are left and right two halves which can be buckled, the shapes of the outer surfaces of the clamping cushion blocks are matched with the circular truncated cone-shaped grooves in the upper pull rod 1, the middle connecting module 2 and the lower pull rod 3, and the inner space of the clamping cushion blocks is an isosceles trapezoid groove matched with the shape of a clamping section of the sheet-like plate sample and used for firmly clamping the sample and fixing the sample on the clamp;
the clamping cushion blocks 5 for the cylindrical step samples are left and right two halves which can be buckled, the shapes of the outer surfaces of the clamping cushion blocks are matched with the circular truncated cone-shaped grooves in the upper pull rod 1, the middle connecting module 2 and the lower pull rod 3, and the inner space of the clamping cushion blocks is a double-layer cylindrical groove matched with the shape of a clamping section of the cylindrical step sample and used for firmly clamping the sample and fixing the sample on the clamp.
In one implementation, the fiber prefabricated member is prepared by taking continuous silicon carbide fibers with the tow specification of 0.5K as raw materials and obtaining the fiber prefabricated member through three-dimensional weaving, the volume content of the fibers in the prefabricated member is 30-50%, and the prefabricated member is not machined so as to ensure the service performance of parts.
In one implementation, the carbon coating deposition is carried out on the prefabricated part in a chemical vapor deposition furnace by selecting methane as a carbon source and hydrogen as a carrier gas in the preparation of the prefabricated part coating, wherein the deposition temperature is 1000-1200 ℃, the deposition time is 2 hours, and the gas pressure is 0.5KPa-2 KPa.
In one implementation, trichloromethylsilane is used as a silicon carbide source, hydrogen is used as a carrier gas, high-purity argon is used as a diluent gas to carry out chemical vapor infiltration treatment on the prefabricated member in the chemical vapor infiltration treatment of the prefabricated member, and H is controlled2The quantity ratio of the MTS material to the MTS material is 9-12: 1, the deposition temperature is 1000-1200 ℃, the deposition time is 10-40h, and the gas pressure is 1KPa-5 KPa.
In one implementation, the pre-fabricated part is subjected to vacuum pumping and exhaust treatment firstly, then 20-60mim dipping treatment is carried out on the pre-fabricated part under the argon pressure of 1-2 MPa by adopting a single-component polycarbosilane solution with the viscosity of 20-30mPa.s, the dipped pre-fabricated part is dried and then cracked at high temperature by taking high-purity nitrogen as protective gas, the cracking temperature is 1000-1200 ℃, the heating rate is 10-15 ℃/mim, the heat preservation time is 20-40mim, and the process needs to be repeated for 8-10 times.
In one implementation, trichloromethylsilane is used as a silicon carbide source, hydrogen is used as a carrier gas, and high-purity chlorine is used as a diluent gas to perform chemical vapor infiltration treatment on the prefabricated part in the chemical vapor infiltration densification treatment of the part, and H is controlled2The quantity ratio of the MTS material to the MTS material is 9-12: 1, the deposition temperature is 1000-1200 ℃, the deposition time is 10-40h, and the gas pressure is 1KPa-5 KPa.
In one implementation, the part is heat treated by holding the part at 1350-.
The silicon carbide ceramic clamp for the creep test has the advantages of excellent ablation resistance, heat crack resistance and oxidation resistance, light weight, high coaxiality and long service life, can be properly matched with the existing endurance testing machine and high-temperature furnace in the shape size and structural form, and can provide hardware guarantee for the creep test of the ultra-high temperature of more than 1500 ℃.
Drawings
FIG. 1 is a schematic view showing the structure of an upper tie bar of a silicon carbide ceramic jig according to the present invention
FIG. 2 is a schematic view showing the structure of the lower tie bar of the silicon carbide ceramic jig according to the present invention
FIG. 3 is a schematic structural view of an intermediate connection module of the silicon carbide ceramic jig according to the present invention
FIG. 4 is a schematic structural diagram of a clamping cushion block of the silicon carbide ceramic clamp for a sheet-like plate sample
FIG. 5 is a schematic structural diagram of a clamping cushion block of the silicon carbide ceramic clamp for a cylindrical step sample
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Features of various aspects of embodiments of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. The following description of the embodiments is merely intended to better understand the present invention by illustrating examples thereof. The present invention is not limited to any particular arrangement or method provided below, but rather covers all product structures, any modifications, alterations, etc. of the method covered without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention.
Referring to the attached drawings 1-5, the silicon carbide ceramic clamp for the ultra-high temperature creep test of a metal material at 1500 ℃ comprises an upper pull rod 1, an intermediate connection module 2, a lower pull rod 3, a clamping cushion block 4 for a sheet-like plate sample and a clamping cushion block 5 for a cylindrical step sample, wherein the low-temperature ends of the upper pull rod 1 and the lower pull rod 3 are respectively connected and fixed with a creep test machine through pins, and the high-temperature ends are connected and fixed with the sample through the clamping cushion block;
the clamping cushion block 4 for the sheet-shaped plate sample is used for a creep test of the plate sample, an isosceles trapezoid groove in the clamping cushion block is used for being connected and fixed with the sample, and a circular table surface on the outer side of the clamping cushion block is used for being connected and fixed with the grooves in the high-temperature ends of the upper pull rod 1 and the lower pull rod 3;
the clamping cushion block 5 for the cylindrical step sample is used for a creep test of the bar sample, a double-layer cylindrical groove in the clamping cushion block is used for being connected and fixed with the sample, and a circular table surface on the outer side of the clamping cushion block is used for being connected and fixed with the grooves in the high-temperature ends of the upper pull rod 1 and the lower pull rod 3;
the two ends of the middle connecting module 2 are provided with truncated cone-shaped slots, the two samples can be connected and fixed through the clamping cushion blocks, and meanwhile, the two samples are fed into the furnace for a creep test;
the preparation of the upper pull rod 1, the middle connecting module 2, the lower pull rod 3, the clamping cushion block 4 for the sheet-shaped plate sample and the clamping cushion block 5 for the cylindrical step sample comprises fiber prefabricated part preparation, prefabricated part coating preparation, prefabricated part chemical vapor infiltration treatment, precursor impregnation cracking treatment, part chemical vapor infiltration densification treatment, part heat treatment and machining.
The upper pull rod 1 and the lower pull rod 3 are identical in shape and structure, the low-temperature section of the upper pull rod is cylindrical, two cylindrical pin holes 11 are formed in the low-temperature section of the upper pull rod, the transition section of the upper pull rod is in a shape of a trimming circular truncated cone with gradually increased sectional area, the high-temperature section of the upper pull rod is in a shape of a square column with edges being ground into round corners, a square through hole I12 is formed in the high-temperature section of the upper pull rod, and a circular truncated cone-shaped groove I13 is formed between.
The appearance of intermediate junction module 2 is the square, and the centre is opened there is square through hole II 21, opens between two bottom surfaces of square through hole II 21 and has round platform form fluting II 22 in order to connect two samples simultaneously in a test through the centre gripping cushion.
The clamping cushion blocks 4 for the sheet-like plate samples are left and right two halves which can be buckled, the shapes of the outer surfaces of the clamping cushion blocks are matched with the circular truncated cone-shaped grooves in the upper pull rod 1, the middle connecting module 2 and the lower pull rod 3, and the inner space of the clamping cushion blocks is an isosceles trapezoid groove matched with the shape of a clamping section of the sheet-like plate sample and used for firmly clamping the sample and fixing the sample on the clamp;
the clamping cushion blocks 5 for the cylindrical step samples are left and right two halves which can be buckled, the shapes of the outer surfaces of the clamping cushion blocks are matched with the circular truncated cone-shaped grooves in the upper pull rod 1, the middle connecting module 2 and the lower pull rod 3, and the inner space of the clamping cushion blocks is a double-layer cylindrical groove matched with the shape of a clamping section of the cylindrical step sample and used for firmly clamping the sample and fixing the sample on the clamp.
The fiber prefabricated member is prepared by taking continuous silicon carbide fibers with the tow specification of 0.5K as raw materials and obtaining the fiber prefabricated member through three-dimensional weaving, wherein the volume content of the fibers in the prefabricated member is 30-50%, and the prefabricated member is not subjected to mechanical processing so as to ensure the service performance of parts.
The carbon coating deposition is carried out on the prefabricated part in a chemical vapor deposition furnace by selecting methane as a carbon source and hydrogen as a carrier gas in the preparation of the prefabricated part coating, wherein the deposition temperature is 1000-1200 ℃, the deposition time is 2 hours, and the gas pressure is 0.5KPa-2 KPa.
In the chemical vapor infiltration treatment of the prefabricated member, trichloromethylsilane is used as a silicon carbide source, hydrogen is used as a carrier gas, high-purity argon is used as a diluent gas to carry out the chemical vapor infiltration treatment on the prefabricated member, and H is controlled2The quantity ratio of the MTS material to the MTS material is 9-12: 1, the deposition temperature is 1000-1200 ℃, the deposition time is 10-40h, and the gas pressure is 1KPa-5 KPa.
Performing vacuum-pumping and exhaust treatment on the prefabricated member, performing 20-60mim impregnation treatment on the prefabricated member by adopting a single-component polycarbosilane solution with the viscosity of 20-30mPa.s under the argon pressure of 1-2 MPa, drying the impregnated prefabricated member, and cracking the impregnated prefabricated member at high temperature by taking high-purity nitrogen as protective gas, wherein the cracking temperature is 1000-1200 ℃, the heating rate is 10-15 ℃/mim, the heat preservation time is 20-40mim, and the process needs to be repeated for 8-10 times.
In the chemical vapor infiltration densification treatment of the parts, trichloromethylsilane is used as a silicon carbide source, hydrogen is used as a carrier gas, high-purity chlorine is used as a diluent gas to carry out chemical vapor infiltration treatment on the prefabricated parts, and H is controlled2The quantity ratio of the MTS material to the MTS material is 9-12: 1, the deposition temperature is 1000-1200 ℃, the deposition time is 10-40h, and the gas pressure is 1KPa-5 KPa.
In the part heat treatment, the part is kept at the temperature of 1350-.
The silicon carbide ceramic clamp for the ultra-high temperature creep test of the metal material at the temperature of more than 1500 ℃ in the embodiment has excellent ablation resistance, thermal crack resistance and oxidation resistance, light weight, high coaxiality and long service life, can be properly matched with the existing endurance testing machine and high-temperature furnace in the shape size and structural form, and can provide hardware guarantee for the ultra-high temperature creep test at the temperature of more than 1500 ℃.
The foregoing disclosure shows in detail preferred embodiments of the invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, all technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a preparation method for silicon carbide ceramic anchor clamps of metal creep test, this silicon carbide ceramic anchor clamps can be used for the lasting creep test of the high temperature more than 1500 degrees centigrade of metal material, and this silicon carbide ceramic anchor clamps include upper portion pull rod (1), intermediate junction module (2), lower part pull rod (3), be used for clamping cushion (4) of slice panel sample and be used for cylindric ladder sample clamping cushion (5), the low temperature end of upper portion pull rod (1) and lower part pull rod (3) is connected fixedly through pin and lasting creep testing machine respectively, and the high temperature end is connected fixedly through clamping cushion and sample, its characterized in that:
the clamping cushion block (4) for the sheet-shaped plate sample is used for a creep test of the plate sample, an isosceles trapezoid groove in the clamping cushion block is used for being connected and fixed with the sample, and a circular table surface on the outer side of the clamping cushion block is used for being connected and fixed with the grooves in the high-temperature ends of the upper pull rod (1) and the lower pull rod (3);
the clamping cushion block (5) for the cylindrical step sample is used for a creep test of the bar sample, a double-layer cylindrical groove in the clamping cushion block is used for being connected and fixed with the sample, and a circular table surface on the outer side of the clamping cushion block is used for being connected and fixed with the grooves in the high-temperature ends of the upper pull rod (1) and the lower pull rod (3);
the two ends of the middle connecting module (2) are provided with truncated cone-shaped slots, two samples can be connected and fixed through the clamping cushion blocks, and meanwhile the two samples are fed into the furnace for a creep test;
the preparation of the upper pull rod (1), the middle connecting module (2), the lower pull rod (3), the clamping cushion block (4) for the sheet-shaped plate sample and the clamping cushion block (5) for the cylindrical stepped sample comprises fiber prefabricated part preparation, prefabricated part coating preparation, prefabricated part chemical vapor infiltration treatment, precursor impregnation cracking treatment, part chemical vapor infiltration densification treatment, part heat treatment and mechanical processing.
2. The method of claim 1, wherein the method comprises the steps of: the shape and the structure of upper portion pull rod (1) and lower part pull rod (3) are the same, and its low temperature section is cylindric, and it has two cylindric cotter holes (11) to open on it, and the changeover portion is the side cut round platform form that the sectional area increases gradually, and the high temperature section is the square column form that the fillet was ground into to the edge, and it has square through hole I (12) to open on it, and it has round platform form fluting I (13) to hang the sample through the centre gripping cushion to open between square through hole I (12) and the bottom surface.
3. The method of claim 1, wherein the method comprises the steps of: the middle connecting module (2) is in a square shape, a square through hole II (21) is formed in the middle of the middle connecting module, and a round table-shaped groove II (22) is formed between the two bottom surfaces of the square through hole II (21) so as to simultaneously connect two samples in one test through a clamping cushion block.
4. The method of claim 1, wherein the method comprises the steps of: the clamping cushion blocks (4) for the sheet-like plate samples are left and right two halves which can be buckled, the shapes of the outer surfaces of the clamping cushion blocks are matched with the circular truncated cone-shaped grooves in the upper pull rod (1), the middle connecting module (2) and the lower pull rod (3), and the inner space of the clamping cushion blocks is an isosceles trapezoid groove matched with the shape of a clamping section of the sheet-like plate sample and used for firmly clamping the sample and fixing the sample on the clamp;
the clamping cushion blocks (5) for the cylindrical step samples are a left half and a right half which can be buckled, the shapes of the outer surfaces of the clamping cushion blocks are matched with the circular truncated cone-shaped grooves in the upper pull rod (1), the middle connecting module (2) and the lower pull rod (3), and the inner space of the clamping cushion blocks is a double-layer cylindrical groove matched with the shape of a clamping section of the cylindrical step sample and used for firmly clamping the sample and fixing the sample on the clamp.
5. The method of claim 1, wherein the method comprises the steps of: the fiber prefabricated member is prepared by taking continuous silicon carbide fibers with the tow specification of 0.5K as raw materials and obtaining the fiber prefabricated member through three-dimensional weaving, wherein the volume content of the fibers in the prefabricated member is 30-50%, and the prefabricated member is not subjected to mechanical processing so as to ensure the service performance of parts.
6. The method of claim 1, wherein the method comprises the steps of: the carbon coating deposition is carried out on the prefabricated part in a chemical vapor deposition furnace by selecting methane as a carbon source and hydrogen as a carrier gas in the preparation of the prefabricated part coating, wherein the deposition temperature is 1000-1200 ℃, the deposition time is 2 hours, and the gas pressure is 0.5KPa-2 KPa.
7. The method of claim 1, wherein the method comprises the steps of: in the chemical vapor infiltration treatment of the prefabricated member, trichloromethylsilane is used as a silicon carbide source, hydrogen is used as a carrier gas, high-purity argon is used as a diluent gas to carry out the chemical vapor infiltration treatment on the prefabricated member, and H is controlled2The quantity ratio of the MTS material to the MTS material is 9-12: 1, the deposition temperature is 1000-1200 ℃, the deposition time is 10-40h, and the gas pressure is 1KPa-5 KPa.
8. The method of claim 1, wherein the method comprises the steps of: performing vacuum-pumping and exhaust treatment on the prefabricated member, performing 20-60mim impregnation treatment on the prefabricated member by adopting a single-component polycarbosilane solution with the viscosity of 20-30mPa.s under the argon pressure of 1-2 MPa, drying the impregnated prefabricated member, and cracking the impregnated prefabricated member at high temperature by taking high-purity nitrogen as protective gas, wherein the cracking temperature is 1000-1200 ℃, the heating rate is 10-15 ℃/mim, the heat preservation time is 20-40mim, and the process needs to be repeated for 8-10 times.
9. The method of claim 1, wherein the method comprises the steps of: in the chemical vapor infiltration densification treatment of the parts, trichloromethylsilane is used as a silicon carbide source, hydrogen is used as a carrier gas, high-purity chlorine is used as a diluent gas to carry out chemical vapor infiltration treatment on the prefabricated parts, and H is controlled2The quantity ratio of the MTS material to the MTS material is 9-12: 1, the deposition temperature is 1000-1200 ℃, the deposition time is 10-40h, and the gas pressure is 1KPa-5 KPa.
10. The method of claim 1, wherein the method comprises the steps of: in the part heat treatment, the part is kept at the temperature of 1350-.
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| CN202011227162.0A CN112525722A (en) | 2020-11-05 | 2020-11-05 | Preparation method of silicon carbide ceramic clamp for metal creep test |
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| CN202011227162.0A CN112525722A (en) | 2020-11-05 | 2020-11-05 | Preparation method of silicon carbide ceramic clamp for metal creep test |
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| US20100289192A1 (en) * | 2004-02-13 | 2010-11-18 | Dicarlo James A | Methods for Producing High-Performance Silicon Carbide Fibers, Architectural Preforms, and High-Temperature Composite Structures |
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