CN107056315A - A kind of silicon carbide ceramics for being embedded with plasticizing substance - Google Patents

A kind of silicon carbide ceramics for being embedded with plasticizing substance Download PDF

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CN107056315A
CN107056315A CN201611165396.0A CN201611165396A CN107056315A CN 107056315 A CN107056315 A CN 107056315A CN 201611165396 A CN201611165396 A CN 201611165396A CN 107056315 A CN107056315 A CN 107056315A
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silicon carbide
embedded
carbide ceramics
plasticizing substance
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周春毅
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Wuzhong District Dome High Polymer Material Technology Research Institute
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Wuzhong District Dome High Polymer Material Technology Research Institute
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Abstract

The present invention provides a kind of silicon carbide ceramics for being embedded with plasticizing substance, is related to technical field of functional ceramics, the silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：100~120 parts of silicon carbide powder, 50~80 parts of porous carbon, 15~30 parts of reinforcing fiber, 15~30 parts of binding agent, 3~5 parts of surfactant, the present invention uses carborundum to be toughened and strengthened phase for principal phase, enhancing chopped fiber, significantly improves the fracture toughness and intensity of silicon carbide ceramics.

Description

A kind of silicon carbide ceramics for being embedded with plasticizing substance
Technical field
The present invention relates to technical field of functional ceramics, and in particular to a kind of silicon carbide ceramics for being embedded with plasticizing substance.
Background technology
Thyrite has that elevated temperature strength is big, high-temperature oxidation resistance is strong, abrasion resistance properties good, heat endurance is good, Thermal coefficient of expansion is small, thermal conductivity is big, hardness is high, anti-thermal shock and the good characteristic such as resistant to chemical etching, in automobile, mechanical chemical industry, ring There is increasingly extensive application in the fields such as border protection, space technology, information electronics, the energy, have become a kind of in many industry The irreplaceable structural ceramics of the other materials of field excellent performance.
But it is similar with other all kinds of ceramics, silicon carbide ceramics equally faces brittleness problems, how to provide the carbon of high tenacity SiClx ceramics, are the important topics of production field concern.At present, ceramic toughening mode mainly has transformation toughening, fiber (brilliant Must) toughness reinforcing, particulate reinforcement and composite toughening.Ceramics of silicon carbide toughened containing silicon carbide whisker or Carbon fibe is strictly a class Silicon carbide ceramics with higher toughness, still, because the silicon carbide whisker raw material cost wherein contained is higher so that whole to increase The cost of tough ceramic product rises therewith, introduces silicon carbide whisker or Carbon fibe carries out toughness reinforcing, can really make silicon carbide ceramics toughness Increase substantially, still, draw ratio very high silicon carbide whisker and Carbon fibe are generally speaking more difficult with other silicon carbide ceramics Raw materials for production are well mixed, and this have impact on the greater homogeneity of ceramics of silicon carbide toughened finished product to a certain extent.
The purpose of the present invention, is to provide a kind of new toughness reinforcing scheme, the purpose of the present invention be using silicon carbide whisker and The toughness reinforcing of Carbon fibe is surging, while silicon carbide whisker and Carbon fibe is used in combination, and introduces the third appropriate cheap Plasticizing substance, toughness reinforcing is combined together with silicon carbide whisker and Carbon fibe to silicon carbide ceramics, to reduce for relative The dependence of scattered silicon carbide whisker and Carbon fibe is difficult to, and weakens the negative effect that batch mixing inequality may be brought.This solution Certainly scheme will take into account the various beneficial toughening effects addressed above, the third described appropriate cheap plasticizing substance as far as possible As should be easy as possible and other mixed uniformly materials of silicon carbide ceramics raw materials for production.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of silicon carbide ceramics for being embedded with plasticizing substance, it is great Improve the wilfulness of ceramics.
To realize object above, the present invention is achieved by the following technical programs：
A kind of silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：Silicon carbide powder 100~ 120 parts, 50~80 parts of porous carbon, 15~30 parts of reinforcing fiber, 15~30 parts of binding agent, 3~5 parts of surfactant.
It is preferred that, the silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：Silicon carbide powder 100~120 parts, 60~80 parts of porous carbon, 15~25 parts of reinforcing fiber, 15~25 parts of binding agent, 3~5 parts of surfactant.
It is preferred that, the silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：Silicon carbide powder 100 parts, 68 parts of porous carbon, 20 parts of reinforcing fiber, 22 parts of binding agent, 3 parts of surfactant.
It is preferred that, a diameter of 300~800nm of the silicon carbide powder.
It is preferred that, the reinforcing fiber is CNT, carbon fiber, silicon carbide fibre, zirconium oxide whisker, aluminum oxide crystalline substance One or more in palpus, silica whisker, titanium dioxide crystal whisker.
It is preferred that, the average diameter of the reinforcing fiber is 0.5~1.5 micron, and length is 50~200 microns.
It is preferred that, the binding agent is polytetrafluoroethylene (PTFE), polyvinyl alcohol, polyvinylpyrrolidone, carboxymethyl cellulose, poly- One kind in vinyl butyral.
Beneficial effects of the present invention：
(1) silicon carbide ceramics that the present invention is prepared using activated carbon ihrigising has higher bond strength.
(2) the characteristics of reinforcing fiber has high intensity, high-modulus and excellent high-temperature oxidation, produces composite ceramics Effect, crack deflection are transferred to, so as to improve the fracture toughness of product.
The present invention uses carborundum to be toughened and strengthened phase for principal phase, enhancing chopped fiber, significantly improves the disconnected of silicon carbide ceramics Split toughness and intensity.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention, Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one Divide embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making The every other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.
Embodiment 1：
A kind of silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：A diameter of 300nm carbonization 100 parts of silicon powder, 68 parts of porous carbon, 10 parts of carbon fiber, 10 parts of silicon carbide fibre, 22 parts of polytetrafluoroethylene (PTFE), surfactant 3 Part, wherein the average diameter of carbon fiber is 0.5 micron, and length is 200 microns, and the average diameter of carborundum is 1 micron, and length is 100 microns.
The preparation method of the silicon carbide ceramics for being embedded with plasticizing substance, comprises the following steps：
(1) silicon carbide powder, porous carbon, carbon fiber, silicon carbide fibre, polytetrafluoroethylene (PTFE), surfactant are added water mixed Close uniform, and compression molding, obtain green compact；
(2) green compact are put into vacuum sintering furnace, and the pre-sintering 2hr under conditions of 500 DEG C, pre-sintered base is obtained, then 3hr is sintered under conditions of 1300 DEG C, the silicon carbide ceramics for being embedded with plasticizing substance is obtained.
Close its body of the silicon carbide ceramics for being embedded with plasticizing substance of the present embodiment is 2.8g/cm3, hardness is 95HRA, and bending resistance is strong Spend for 680MPa, fracture toughness is 7.8MPam1/2
Embodiment 2：
A kind of silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：A diameter of 500nm carbonization 100 parts of silicon powder, 60 parts of porous carbon, 10 parts of silica whisker, 15 parts of titanium dioxide crystal whisker, 30 parts of polyvinyl alcohol, surface are lived Property 3 parts of agent, the wherein average diameter of silica whisker is 1.2 microns, and length is 150 microns, and titanium dioxide crystal whisker is averaged A diameter of 1 micron, length is 120 microns.
The preparation method of the silicon carbide ceramics for being embedded with plasticizing substance, comprises the following steps：
(1) by silicon carbide powder, porous carbon, silica whisker, titanium dioxide crystal whisker, polyvinyl alcohol, surfactant It is mixed with water, and compression molding, obtain green compact；
(2) green compact are put into vacuum sintering furnace, and the pre-sintering 2hr under conditions of 500 DEG C, pre-sintered base is obtained, then 3hr is sintered under conditions of 1300 DEG C, the silicon carbide ceramics for being embedded with plasticizing substance is obtained.
Close its body of the silicon carbide ceramics for being embedded with plasticizing substance of the present embodiment is 3.05g/cm3, hardness is 76HRA, bending resistance Intensity is 635MPa, and fracture toughness is 8.9MPam1/2
Embodiment 3：
A kind of silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：A diameter of 800nm carbonization 105 parts of silicon powder, 80 parts of porous carbon, 10 parts of zirconium oxide whisker, 20 parts of alumina whisker, 25 parts of polyvinylpyrrolidone, surface 3 parts of activating agent, the wherein average diameter of zirconium oxide whisker are 1.5 microns, and length is 200 microns, and being averaged for alumina whisker is straight Footpath is 1.5 microns, and length is 50 microns.
The preparation method of the silicon carbide ceramics for being embedded with plasticizing substance, comprises the following steps：
(1) by silicon carbide powder, porous carbon, zirconium oxide whisker, alumina whisker, polyvinylpyrrolidone, surface-active Agent is mixed with water, and compression molding, obtains green compact；
(2) green compact are put into vacuum sintering furnace, and the pre-sintering 2hr under conditions of 500 DEG C, pre-sintered base is obtained, then 3hr is sintered under conditions of 1300 DEG C, the silicon carbide ceramics for being embedded with plasticizing substance is obtained.
Close its body of the silicon carbide ceramics for being embedded with plasticizing substance of the present embodiment is 3.8g/cm3, hardness is 88HRA, and bending resistance is strong Spend for 620MPa, fracture toughness is 8.3MPam1/2
Embodiment 4：
A kind of silicon carbide ceramics for being embedded with plasticizing substance, by the material composition of following parts by weight：A diameter of 500nm carbonization 120 parts of silicon powder, 50 parts of porous carbon, 25 parts of CNT, 15 parts of polyvinyl butyral resin, 5 parts of surfactant, wherein carbon is received The average diameter of mitron is 0.5 micron, and length is 50 microns.
The preparation method of the silicon carbide ceramics for being embedded with plasticizing substance, comprises the following steps：
(1) silicon carbide powder, porous carbon, CNT, polyvinyl butyral resin, surfactant are added water into mixing It is even, and compression molding, obtain green compact；
(2) green compact are put into vacuum sintering furnace, and the pre-sintering 2hr under conditions of 500 DEG C, pre-sintered base is obtained, then 3hr is sintered under conditions of 1300 DEG C, the silicon carbide ceramics for being embedded with plasticizing substance is obtained.
Close its body of the silicon carbide ceramics for being embedded with plasticizing substance of the present embodiment is 3.5g/cm3, hardness is 95HRA, and bending resistance is strong Spend for 650MPa, fracture toughness is 7.2MPam1/2
To sum up, the embodiment of the present invention has the advantages that：The present invention use carborundum for principal phase, strengthen chopped fiber be Toughened and strengthened phase, significantly improves the fracture toughness and intensity of silicon carbide ceramics.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that Also there is other identical element in process, method, article or equipment including the key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (7)

1. a kind of silicon carbide ceramics for being embedded with plasticizing substance, it is characterised in that by the material composition of following parts by weight：Carborundum powder 100~120 parts of body, 50~80 parts of porous carbon, 15~30 parts of reinforcing fiber, 15~30 parts of binding agent, 3~5 parts of surfactant.
2. the as claimed in claim 1 silicon carbide ceramics for being embedded with plasticizing substance, it is characterised in that the plasticizing substance that is embedded with Silicon carbide ceramics, by the material composition of following parts by weight：100~120 parts of silicon carbide powder, 50~80 parts of porous carbon, enhancing are fine 15~30 parts of dimension, 15~30 parts of binding agent, 3~5 parts of surfactant.
3. the as claimed in claim 2 silicon carbide ceramics for being embedded with plasticizing substance, it is characterised in that the plasticizing substance that is embedded with Silicon carbide ceramics, by the material composition of following parts by weight：100~120 parts of silicon carbide powder, 15~30 parts of reinforcing fiber, bonding 15~30 parts of agent, 3~5 parts of surfactant.
4. the as claimed in claim 3 silicon carbide ceramics for being embedded with plasticizing substance, it is characterised in that the silicon carbide powder it is straight Footpath is 300~800nm.
5. the silicon carbide ceramics as claimed in claim 4 for being embedded with plasticizing substance, it is characterised in that the reinforcing fiber is received for carbon One in mitron, carbon fiber, silicon carbide fibre, zirconium oxide whisker, alumina whisker, silica whisker, titanium dioxide crystal whisker Plant or a variety of.
6. the as claimed in claim 5 silicon carbide ceramics for being embedded with plasticizing substance, it is characterised in that the reinforcing fiber is averaged A diameter of 0.5~1.5 micron, length is 50~200 microns.
7. the silicon carbide ceramics as claimed in claim 6 for being embedded with plasticizing substance, it is characterised in that the binding agent is polytetrafluoro One kind in ethene, polyvinyl alcohol, polyvinylpyrrolidone, carboxymethyl cellulose, polyvinyl butyral resin.
CN201611165396.0A 2016-12-16 2016-12-16 A kind of silicon carbide ceramics for being embedded with plasticizing substance Pending CN107056315A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108727050A (en) * 2018-05-28 2018-11-02 绿业中试低碳科技（镇江）有限公司 Carbon Materials 3D toughened silicon carbide composite materials and its preparation method and application
CN109293365A (en) * 2018-10-26 2019-02-01 陕西科技大学 A kind of orienting stephanoporate silicon carbide ceramics and its preparation method and application
CN109987955A (en) * 2019-04-12 2019-07-09 王小玲 A kind of C effectively improving interfacial combined functionf/ SiC ceramic matrix composite material and preparation method
CN115259833A (en) * 2022-09-19 2022-11-01 新明珠集团股份有限公司 Ceramic thin plate and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101165002A (en) * 2006-10-16 2008-04-23 宁波大学 Method for preparing silicon carbide ceramic plasticized by three substances combination

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101165002A (en) * 2006-10-16 2008-04-23 宁波大学 Method for preparing silicon carbide ceramic plasticized by three substances combination

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108727050A (en) * 2018-05-28 2018-11-02 绿业中试低碳科技（镇江）有限公司 Carbon Materials 3D toughened silicon carbide composite materials and its preparation method and application
CN109293365A (en) * 2018-10-26 2019-02-01 陕西科技大学 A kind of orienting stephanoporate silicon carbide ceramics and its preparation method and application
CN109987955A (en) * 2019-04-12 2019-07-09 王小玲 A kind of C effectively improving interfacial combined functionf/ SiC ceramic matrix composite material and preparation method
CN115259833A (en) * 2022-09-19 2022-11-01 新明珠集团股份有限公司 Ceramic thin plate and preparation method thereof
CN115259833B (en) * 2022-09-19 2022-12-20 新明珠集团股份有限公司 Ceramic thin plate and preparation method thereof

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