CN101164973B - Silicon carbide ceramic embedded with plasticizing substance - Google Patents
Silicon carbide ceramic embedded with plasticizing substance Download PDFInfo
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- CN101164973B CN101164973B CN2006101370088A CN200610137008A CN101164973B CN 101164973 B CN101164973 B CN 101164973B CN 2006101370088 A CN2006101370088 A CN 2006101370088A CN 200610137008 A CN200610137008 A CN 200610137008A CN 101164973 B CN101164973 B CN 101164973B
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Abstract
This invention relates to the silicon carbide ceramic, particularly the toughness improved silicon carbide ceramic containing plate alumina insert granules. This invention provides a technique pattern for production of the inventive product. The price of the plate alumina granules is cheaper and is easy to be mixed with other components. The inventive product is even ceramic and better toughness. This invention solves some problems such as crack formation.
Description
Technical field
The present invention relates to a kind of pottery, is about silicon carbide ceramics, particularly a kind of ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.
Background technology
Mostly the present ceramics of silicon carbide toughened of report is to contain the ceramics of silicon carbide toughened of silicon carbide whisker or charcoal fiber.The report of the relevant ceramics of silicon carbide toughened that contains silicon carbide whisker referring to: Tian Jiemo etc. invent (design), Tsing-Hua University's application, application number is the patent application case " reinforcing of carbon-ceramics composite material with flexibilizer for coystal whiskers " of CN91101684.8; And, the big J Pai Qike invention of A Lishan (design), Tang Chemical Corporation's application, application number is the patent application case " silicon carbide whisker reinforced ceramic composites and manufacture method thereof " of CN90110427.2; And, inventions such as Cheng Laifei, Zhang Litong, Xu Yongdong, Liu Yongsheng, Li Zhen, Wang Xiaoming (design), the application of NW China polytechnical university, application number is the patent application case " a kind of whisker and particulate reinforcement ceramic matric composite preparation method " of CN200410026337.6.The report of the relevant ceramics of silicon carbide toughened that contains the charcoal fiber referring to: Geng Haoran etc. invent (design), University Of Ji'nan's application, application number is the patent application case " a kind of device and technology for preparing carbon fibre reinforced silicon carbide composite material " of CN03138926.0.
Good characteristics such as thyrite has that hot strength is big, high-temperature oxidation resistance is strong, abrasion resistance properties is good, thermostability is good, thermal expansivity is little, thermal conductivity is big, hardness is high, anti-thermal shock and resistance to chemical attack; in fields such as automobile, mechanical chemical industry, environment protection, space technology, information electronics, the energy increasingly extensive application is arranged, become a kind of irreplaceable structural ceramics of other materials at a lot of industrial circle excellent performances.
Dynamic seal in the mechanical means is to be undertaken by the rotational slide of two seal face materials, as the seal face material, requires the hardness height, has wearability.Suitable height of the hardness of silicon carbide ceramics and frictional coefficient are little, so silicon carbide ceramics can obtain sliding properties that other material is beyond one's reach as the mechanical seal end surface material.On the other hand, two mechanical seal materials can produce certain heat owing to rub in rotary movement, thereby the local temperature of seal face is raise, so the end face material also must can tolerate certain temperature.In the rotational slide process, produce thermal strain and hot tearing for fear of the mechanical seal material, require thermal conductivity height, the good thermal shock of end face material.At present, silicon carbide ceramics has obtained a large amount of application in all kinds of mechanical seals, and for the laborsaving of mechanical means with energy-conservationly made very big contribution, demonstrate other materials incomparable superiority.Silicon carbide ceramics also successfully is used as various bearings, cutting tool in mechanical industry.
What need in the occasion of needs such as aerospace, nuclear industry tolerances ultra high temp such as nuclear fission and the fusion reactor bears 2000 degree left and right sides pyritous heat-stable materials; Rocket and aerospacecraft surface are used for tolerating the thermal insulation tile up to thousands of K temperature that produces with the violent friction of atmosphere; Rocket combustion chamber's larynx lining and inner lining material, gas-turbine blade; The top board of High Temperature Furnaces Heating Apparatus, support, and the high temperature members such as jig of high temperature experiment usefulness also generally adopt the silicon carbide ceramics member.Silicon carbide ceramics also is widely used as various corrosion-resistant with container and pipeline in petrochemical industry.
With other all kinds of ceramic-like seemingly, silicon carbide ceramics faces the fragility problem equally, and how the silicon carbide ceramics of high tenacity is provided, and is the important topic that this production field is paid close attention to.The Zhou Zhenjun of China's University Of Tianjin's high-temperature structural ceramics and key lab of the engineering ceramics processing technology the Ministry of Education etc., be published in be entitled as " the Research on Toughening progress of high reliability structural ceramics " of " silicate circular " the 3rd phase p57-61 in 2003, and, the Hao Chuncheng of Shandong University etc., be published in be entitled as " progress of particulate reinforcement pottery " of the 16th volume the 2nd phase p28-30 in " material Leader " February in 2002, and, the Guo Jingkun of Shanghai Silicate Inst., Chinese Academy of Sciences's high-performance ceramic and ultrastructure National Key Laboratory, be published in be entitled as " about the fragility problem of stupalith " of the 42nd volume the 6th phase p822-827 in " Fudan Journal (natural science edition) " December in 2003, and, the Liu Hanlian of the advanced jet Engineering Technical Research Centre of School of Mechanical Engineering of Shandong University etc., be published in being entitled as in the papers such as " the toughened and reinforced mechanism progress of nanocomposite ceramic material " of the 22nd volume the 2nd phase p98-103 in " powder metallurgy technology " April in 2004, ceramic toughening theory problem and practice are had detailed introduction.
The malleableize mode of pottery mainly contains that transformation toughening, fiber (whisker) are toughness reinforcing, particulate reinforcement and composite toughening.Wherein, particulate reinforcement is the simplest a kind of method of ceramic toughening, and it has many advantages such as improving intensity and toughness simultaneously.The principal element that influences the second phase particulate composite toughening effect is a matrix and second particulate elastic modulus E, thermalexpansioncoefficient and the biphase chemical compatibility mutually.Wherein chemical compatibility is the compound prerequisite, and two alternately can not exist too much chemical reaction, must have suitable interface comprehensive strength simultaneously again.Utilize the mismatch of thermalexpansioncoefficient, thereby, be the toughened and reinforced main root of complex phase ceramic in the second phase particle and the residual stress field of the inner generation of matrix on every side.Suppose between the second phase particle and the matrix chemical reaction not to take place, if having the mismatch of thermal expansivity, i.e. Δ α=α between the second phase particle and the matrix
p-α
m≠ 0 (p, m represent particle and matrix), when Δ α＞0, the second phase particle is in tensile stress state, and matrix radially is in stretched state, tangentially is in compressed state, and at this moment crackle tends to walk around particle and continues expansion; When Δ α＜0, the second phase particle is in compressive stress state, tangentially is subjected to tensile stress, and at this moment crackle tends at particle place pinning or passes particle.Thereby the appearance of tiny crack can absorb energy and reach toughness reinforcing purpose, one of tiny crack toughening mecha-nism operating is a crack deflection, crack deflection is a kind of crack tip effect, is meant the inclination and the deflection that are taken place when crack tip runs into deflection thing (particle, fiber, whisker, interface etc.) in the crack propagation process; Two of tiny crack toughening mecha-nism operating is crackle bridgings, bridging thing (particle, fiber, whisker etc.) connects near two surfaces of two crackles of bridging thing and provides one to make two crack surfaces close stress mutually, be closure stress, cause stress intensity factor to increase like this with crack propagation.When crack propagation ran into bridging agent, the possible grain failure of bridging thing also the interlocking phenomenon may occur, and promptly crackle is walked around the bridging thing along crystal boundary development and formation friction bridge.Briefly, the second mutually heterogeneous phase particulate is introduced, and will bring a large amount of tiny cracks, and a large amount of dominance or recessive tiny crack help to dissipate or dissolve or absorb external destructive tension stress.In addition, adopting whisker to carry out also existing and extracting effect when toughness reinforcing, extracting effect also is a kind of toughness reinforcing factor that helps.When the second mutually heterogeneous phase particle of introducing is nano particle, also help and suppress growing up of ceramic base material crystal grain, the microminiaturization of ceramic base material crystal grain also is an important toughening mecha-nism operating in the Low fire ceramic, from fracture toughness property value and displaing microstructure observing result, the sample microcosmic is the nano level microscopic structure, then macro manifestations goes out the highest fracture toughness property, can think, the particulate refinement makes weave construction more even, reduced the size of stress concentration and micro-flaw, simultaneously, the particulate refinement also makes micro-flaw quantity increase, that is to say, fine crystalline-granular texture can cause the crystal boundary volume fraction to increase, and in this case, the new crack surfaces of the dissipativeness that generates in the ceramic breaking-down process is long-pending to be increased, need the outside energy that absorbs in the process before the pottery fracture thereby increase considerably, show as ceramic fracture toughness on the macroscopic view and improve.
It is toughness reinforcing to adopt the tabular crystal particle that stupalith is carried out, and also is an effective ceramic toughening approach.The Li Shaochun of China Qingdao Technological University, wear Changhong and be published in being entitled as in " silicon-carbide particle, whisker, wafer toughening ceramic composite study present situation " literary composition of " silicate circular " the 6th phase p63-65 in 2004, silicon-carbide particle, whisker, wafer are applied to the toughness reinforcing situation of non-silicon carbide base material, a detailed introduction is arranged, this article relates to the toughening technology of non-silicon carbide base material, and for example: silicon-carbide particle, silicon carbide whisker, silicon carbide wafer are used for (BaO-Al
2O
3-SiO
2) glass-ceramic, silicon nitride ceramics, TOUGHENING OF ALUMINA CERAMICS.Wherein, the toughening mechanism of silicon carbide wafer is considered to extract mechanism because of crackle bridging mechanism, crack deflection mechanism and wafer after deliberation.
The ceramics of silicon carbide toughened that contains silicon carbide whisker or charcoal fiber is the silicon carbide ceramics that a class has higher toughness really, but, because the silicon carbide whisker raw material cost that wherein contains is higher, make the cost of whole toughening ceramic finished product rise thereupon, in addition, this class ceramics of silicon carbide toughened also has a problem, promptly, in its manufacturing processed, generally speaking difficult and other silicon carbide ceramics raw materials for production uniform mixing of silicon carbide whisker that length-to-diameter ratio is very high and charcoal fiber, this has influenced the quality homogeneity of corresponding ceramics of silicon carbide toughened finished product to a certain extent.
Summary of the invention
Purpose of the present invention, provide a kind of new silicon carbide ceramics, this silicon carbide ceramics is a kind of ceramics of silicon carbide toughened, this ceramics of silicon carbide toughened contains the plasticizing substance of common relatively cheapness, the design of this plasticizing substance will consider to take into account as far as possible the many relative theories that utilize ceramic toughening, the design of this plasticizing substance also to consider it should be a kind of in making the process of ceramics of silicon carbide toughened easily and the mixed uniformly material of other raw materials for production.
The objective of the invention is to reach by the following technical solutions, this technical scheme provides a kind of new silicon carbide ceramics, the material that constitutes described silicon carbide ceramics comprises silicon carbide, and, at the shared mass percent of silicon carbide described in the described silicon carbide ceramics between 70% to 99%, it is characterized in that, the material that constitutes described silicon carbide ceramics also comprises sheet-shaped alpha-alumina particles, described sheet-shaped alpha-alumina particles embeds described silicon carbide ceramics inside, and, at the shared mass percent of sheet-shaped alpha-alumina particles described in the described silicon carbide ceramics between 1% and 30%.In this technical scheme, described sheet-shaped alpha-alumina particles is a plasticizing substance.In described silicon carbide ceramics, the small and a fairly large number of described sheet-shaped alpha-alumina particles of particle exists with homodisperse form.Described silicon carbide ceramics can be the silicon carbide ceramics that forms via the hot-pressing sintering technique manufacturing; Described silicon carbide ceramics also can be the silicon carbide ceramics that forms via the non-pressure sintering technology manufacturing.For the silicon carbide ceramics that forms via the non-pressure sintering technology manufacturing, can also contain the sintering aid material in the pottery, described sintering aid material is the material that adds for the sintering that promotes silicon carbide ceramics, described sintering aid material is trapped in the silicon carbide ceramics after the silicon carbide ceramics sintering is finished, described be trapped in the silicon carbide ceramics the sintering aid material for example: yttrium aluminum garnet, norbide.The art-recognized meanings of described hot-pressing sintering technique, non-pressure sintering technology and sintering aid material is known in silicon carbide ceramics manufacturing field.
In fact the plate width of the sheet-shaped alpha-alumina particles of described embedding silicon carbide ceramics inside and plate width allow a more wide in range distribution with the ratio of sheet, but, distribution range is preferably: the plate width of described sheet-shaped alpha-alumina particles is between 0.3 micron and 6.0 microns, and the plate width of described sheet-shaped alpha-alumina particles and the ratio of sheet are between 3 and 10.
The better distribution range of the plate width of the sheet-shaped alpha-alumina particles of described embedding silicon carbide ceramics inside is: the plate width of described sheet-shaped alpha-alumina particles is between 0.3 micron and 0.9 micron.
The ratio of the content of sheet-shaped alpha-alumina particles in the described silicon carbide ceramics, granule-morphology, plate width, plate width and sheet and element formation etc., X-ray powder diffraction, electron-microscope scanning and microcell ultimate analysis or the like the prior art means that can be used in combination are judged.
Be different from the ceramics of silicon carbide toughened that contains silicon carbide whisker or contain the charcoal fiber, the solution of the present invention provides a kind of ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles, because described sheet-shaped alpha-alumina particles raw material is relatively inexpensive, thereby, contain the ceramics of silicon carbide toughened relatively low cost of sheet aluminum oxide embedded particles.Described sheet-shaped alpha-alumina particles raw material be a kind of in making the process of ceramics of silicon carbide toughened easily and the mixed uniformly material of other raw materials for production, thus, the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles is the uniform ceramics of silicon carbide toughened of a kind of quality.The solution of the present invention take into account utilize that thermal expansion mismatch brings out tiny crack, crack deflection, crackle bridging and sheet insert extract useful toughening mecha-nism operating such as effect.The solution of the present invention provides the toughness reinforcing but not extremely toughness reinforcing ceramics of silicon carbide toughened of a kind of appropriateness, and the ceramics of silicon carbide toughened that the solution of the present invention provides is applicable to that some only need the toughness reinforcing but not extremely toughness reinforcing application scenario of appropriateness.
Embodiment
Embodiment 1, one of the preparation method who contains the ceramics of silicon carbide toughened of sheet aluminum oxide embedded particles: with the C-B sintering aid of 0.5%-3.0% (weight), PVA (polyvinyl alcohol) with 1.0%-5.0% (weight), and, the sheet-shaped alpha-alumina particles of 2.0%-12.0% (weight), and, the carborundum powder of 80.0%-96.5% (weight) carries out dry ball milling to be mixed, compression molding, solidify 100 ℃ of-300 ℃ of temperature ranges, afterwards, 1700 ℃ of-2100 ℃ of temperature range sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.
Wherein, the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product can be provided by Hi-tech Industry Development portion of Chinese Wuhan University, Wuhan University productivity promotion center.The preparation method of described sheet-shaped alpha-alumina particles (tabular alumina powder just) also can find in the prior art, described prior art is for example: (1) contriver is: Sai Ersi R Xibe spy, Ai Tehua L Ge Lawen, Jr, the applicant is: Sheng Geben/promise industrial enamel company limited of pausing, application number is: CN94100796.0, being entitled as: the application for a patent for invention case of " tabular alumina ". (2) contriver is: new Tian Shengjiu, Chen Mingshou, villous themeda is former pure, the applicant is: Merck Patent GmbH, application number is: CN96112590.X is entitled as: the application for a patent for invention case of " flake aluminum oxide and pearly pigment and manufacture method thereof ".In addition, Chinese Zhejiang Province enterprise supply from stock (this thing mainly was the substrate as pearly pigment originally) in a large number.Zhengzhou research institute of Chinese Aluminium Co., Ltd also can provide the technology of preparing of multiple special appearance alumina particle.
Embodiment 2, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method two: with the C-B sintering aid of 0.5%-3.0% (weight), PVA (polyvinyl alcohol) with 1.0%-5.0% (weight), and, the sheet-shaped alpha-alumina particles of 2.0%-12.0% (weight), and, the carborundum powder of 80.0%-96.5% (weight), and an amount of water is made into pasty material, carrying out wet ball grinding mixes, drying, granulation, compression molding, solidify 100 ℃ of-300 ℃ of temperature ranges, afterwards, 1700 ℃ of-2100 ℃ of temperature range sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 3, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method three: with the C-B sintering aid of 0.5%-3.0% (weight), PVA (polyvinyl alcohol) with 1.0%-5.0% (weight), and, the sheet-shaped alpha-alumina particles of 2.0%-12.0% (weight), and, the carborundum powder of 80.0%-96.5% (weight), and, an amount of water, be made into pasty material, carry out mechanical stirring and mix, simultaneously pasty material is applied ultrasonic wave, after so handling, drying, granulation, compression molding, solidify 100 ℃ of-300 ℃ of temperature ranges, afterwards, 1700 ℃ of-2100 ℃ of temperature range sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 4, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method four: with the sheet-shaped alpha-alumina particles of 15.0% (weight), and, the carborundum powder of 85.0% (weight), carry out dry ball milling and mix, afterwards, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 5, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method five: with the sheet-shaped alpha-alumina particles of 30.0% (weight), and, the carborundum powder of 70.0% (weight), carry out dry ball milling and mix, afterwards, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 6, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method six: with the sheet-shaped alpha-alumina particles of 10.0% (weight), and, the carborundum powder of 90.0% (weight), carry out dry ball milling and mix, afterwards, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 7, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method seven: with the sheet-shaped alpha-alumina particles of 15.0% (weight), and, the carborundum powder of 85.0% (weight), and, an amount of water is made into pasty material, carries out wet ball grinding and mixes, after drying, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 8, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method eight: with the sheet-shaped alpha-alumina particles of 10.0% (weight), and, the carborundum powder of 90.0% (weight), and, adequate amount of ethanol is made into pasty material, carries out wet ball grinding and mixes, after drying, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 9, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method nine: with the sheet-shaped alpha-alumina particles of 30.0% (weight), and, the carborundum powder of 70.0% (weight), and, amount of methanol is made into pasty material, carries out wet ball grinding and mixes, after drying, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 10, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method ten: with the sheet-shaped alpha-alumina particles of 30.0% (weight), and, the carborundum powder of 70.0% (weight), and, an amount of water, be made into pasty material, carrying out mechanical stirring mixes, simultaneously pasty material is applied ultrasonic wave, so handle and after drying, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 11, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method 11: with the sheet-shaped alpha-alumina particles of 12.0% (weight), and, the carborundum powder of 88.0% (weight), and, an amount of water is made into pasty material, carries out mechanical stirring and mixes, after drying, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
Embodiment 12, contain sheet aluminum oxide embedded particles ceramics of silicon carbide toughened the preparation method 12: with the sheet-shaped alpha-alumina particles of 1.0% (weight), and, the carborundum powder of 99.0% (weight), and, amount of methanol is made into pasty material, carries out wet ball grinding and mixes, after drying, place graphite jig, under 1950 ℃ of-2200 ℃ of temperature ranges and the pressure more than the 200MPa sintering 0.5-3.0 hour, make the ceramics of silicon carbide toughened that contains sheet aluminum oxide embedded particles.Wherein, the acquiring way of the technology of preparing of sheet-shaped alpha-alumina particles or tailor-made product is with embodiment 1.
For making things convenient for the technician outside this area to understand and enforcement the present invention, it is norbide that the embodiment of all relating in the embodiment of the invention " C-B sintering aid ", " C-B sintering aid " all specify, i.e. B
4C.
In the various embodiments of the present invention, the consumption of related raw material all provides with range format, implements by listed amount ranges, all can realize purpose of the present invention in varying degrees; For making things convenient for the technician outside this area to understand and enforcement the present invention, the intermediate value that can specify the listed amount ranges of each raw material is an optimum amount enforcement value.
For making things convenient for the technician outside this area to understand and enforcement the present invention, it is vacuum carbon tube furnace or hot-pressed sintering furnace that agglomerating plant can be specified; Can find the supplier of many these kind equipments on the internet.
Testing method and dependence test instrument about ceramic performance, for making things convenient for the technician outside this area to go and find out what's going on, be described as follows: key in retrieval with suitable keyword,, can find many relevant informations by Chinese periodical net and foreign language periodicals net and each large search instrument of internet.
Claims (1)
1. silicon carbide ceramics that is embedded with plasticizing substance, the raw material of described silicon carbide ceramics comprises carborundum powder, and, at the shared mass percent of carborundum powder described in the raw material of described silicon carbide ceramics between 70% to 99%, it is characterized in that, the raw material of described silicon carbide ceramics also comprises sheet-shaped alpha-alumina particles, described sheet-shaped alpha-alumina particles embeds described silicon carbide ceramics inside, and, at the shared mass percent of sheet-shaped alpha-alumina particles described in the raw material of described silicon carbide ceramics between 1% and 30%, the plate width of described sheet-shaped alpha-alumina particles and the ratio of sheet are between 3 and 10, and the plate width of described sheet-shaped alpha-alumina particles is between 0.3 micron and 0.9 micron.
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| CN2006101370088A CN101164973B (en) | 2006-10-16 | 2006-10-16 | Silicon carbide ceramic embedded with plasticizing substance |
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| CN101164973B true CN101164973B (en) | 2010-09-01 |
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Non-Patent Citations (4)
| Title |
|---|
| Manabu Fukushima等.Microstructural Characterization of Porous SiliconCarbideMembrane Support With and Without AluminaAdditive.Journal of American Ceramic Society89 5.2006,89(5),experimental procedure部分. |
| Manabu Fukushima等.Microstructural Characterization of Porous SiliconCarbideMembrane Support With and Without AluminaAdditive.Journal of American Ceramic Society89 5.2006,89(5),experimental procedure部分. * |
| 周振君等.样板晶生长法制备Y-TZP/Al2O3复相陶瓷的力学和抗热震性能.耐火材料38 1.2004,38(1),结果与讨论部分. |
| 周振君等.样板晶生长法制备Y-TZP/Al2O3复相陶瓷的力学和抗热震性能.耐火材料38 1.2004,38(1),结果与讨论部分. * |
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