CN86100425A - Silicon nitride ceramic material of high flexibility sintered under normal pressure and manufacture method thereof - Google Patents
Silicon nitride ceramic material of high flexibility sintered under normal pressure and manufacture method thereof Download PDFInfo
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- CN86100425A CN86100425A CN 86100425 CN86100425A CN86100425A CN 86100425 A CN86100425 A CN 86100425A CN 86100425 CN86100425 CN 86100425 CN 86100425 A CN86100425 A CN 86100425A CN 86100425 A CN86100425 A CN 86100425A
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- silicon nitride
- stupalith
- normal pressure
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Abstract
Technical field under the present invention is the high temperature engineering ceramics in the pottery.In the past stupalith or shock resistance are low, perhaps use the heat pressing process manufacturing, complex process, and the cost height, shape of product is simple.The present invention is a matrix with the silicon nitride, adds magnesium-aluminium spinel and stabilized zirconia not, normal pressure (do not have and press) down sintering make high toughness silicon nitride based stupalith.Silicon nitride and additive magnesium-aluminium spinel form β-Mg-Sialon sosoloid.Stupalith of the present invention can be used to make cutting of hardworking material cutter, wire is extracted mould and bulletproof armour material etc.
Description
The technical field of the invention is the high temperature engineering ceramics in the pottery.
Feature of the present invention is to be matrix with the silicon nitride, adds a certain amount of sintering aid, adds a certain amount of unstabilized zirconium dioxide again, carries out sintering not having to press under (normal pressure), makes high toughness silicon nitride based stupalith.
A basic weakness of stupalith is its fragility, and this has also limited its use range, no matter because pottery is transferred to mould or bulletproof armour material as cutting tool, wire, all require material to have toughness preferably.In the past,, silicon-nitride-based ceramic was adopted the heat pressing process manufacturing more in order to improve the fragility of pottery, so that obtain high-density high tenacity material, but its complex process, the cost height.The hot pressed silicon nitride (HPSN) in domestic the seventies latter stage, resistance to impact shock only reaches 4 kilograms-cm/
2Britain Lucas company succeeds in developing the Syalon stupalith, adopts non-pressure sintering technology, and its performance can compare favourably with hot-pressed material, but except that first synthesizing silicon nitride, also must synthesize raw materials such as 15R, and technology is also very complicated.
The present invention is in order to solve the low and hot-pressed material complex process of stupalith shock resistance, the problem that cost is high, employing adds magnesium-aluminium spinel as sintering aid in silicon nitride matrix, add not stabilized zirconia, improve the toughness of sintered compact on the one hand as dispersoid, the crystalline length is increased, further improve sintered compact toughness.
Silicon nitride is the strong covalent bond material, self can not sintering, and must add sintering aid could sintering.Add separately zirconium dioxide in silicon nitride, the reaction of generation gas takes place in silicon nitride and zirconium dioxide under the Yin Gaowen, causes the material can not densification.With the magnesium-aluminium spinel is sintering aid, makes the material quick densifying, and the reaction of having avoided producing gas takes place, and can obtain the high compaction material.
Silicon nitride and magnesium-aluminium spinel generate β '-Mg-Sialon sosoloid, and zirconium dioxide does not generally participate in reaction, except phase transformation and tiny crack effect are toughness reinforcing, can also enlarge markedly β ' crystalline length, and toughness of material is improved significantly.
The addition of sintering aid is 3% when following, acts on too smallly, and material can not sintering.When 15Wt% was above, material property worsened, and shock resistance, wear resistance significantly reduce.The add-on of zirconium dioxide does not show toughening effect when 1Wt% is following, addition is when 15wt% is above, and the abnormal amount of zirconium dioxide increases, and volume effect is excessive, and the sintering process sintered compact may destroy.
Alpha-phase silicon nitride powder with 70～95% adds 3～15% magnesium-aluminium spinel and 1～15% not stabilized zirconia, 1600～1800 ℃ of temperature, under the normal pressure (do not have and press), in the nonoxidizing atmosphere, 30 minutes to 4 hours sintering make high toughness silicon nitride based stupalith.The shock resistance value of this kind material and fracture toughness property (K
IC) value all reaches general hot pressed silicon nitride (HPSN) level, resistance to impact shock is 4.20 a kilograms-cm/
2, fracture toughness property (K
IC) value reaches 5MPam
1/2As cutter, its wear resistance, shock resistance also reach the level of hot pressed silicon nitride (HPSN).
Claims (2)
- The present invention is to be matrix with the silicon nitride, adds a certain amount of sintering aid and a certain amount of not stabilized zirconia, depresses sintering in nothing, makes high toughness silicon nitride based stupalith and manufacture method thereof.In the past, for obtaining the high toughness silicon nitride stupalith, adopted the heat pressing process preparation, complex process, cost height more.1, feature of the present invention is that the silicon nitride with 70～95Wt% is a matrix, adds the magnesium-aluminium spinel of 3～15Wt% and the not stabilized zirconia of 1～15Wt%, makes high toughness silicon nitride based stupalith.
- 2, the batching of claim in 1., after making green compact, insert plumbago crucible, imbed in one or both the silicon nitride in the silicon-dioxide that added 0.5～5Wt%, magnesium oxide, magnesium-aluminium spinel, zirconium dioxide, the boron nitride, in 1600～1800 ℃ of temperature, under the normal pressure (do not have and press), in the nonoxidizing atmosphere, 30 minutes to 4 hours agglomerating manufacture method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86100425 CN86100425A (en) | 1986-01-24 | 1986-01-24 | Silicon nitride ceramic material of high flexibility sintered under normal pressure and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86100425 CN86100425A (en) | 1986-01-24 | 1986-01-24 | Silicon nitride ceramic material of high flexibility sintered under normal pressure and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86100425A true CN86100425A (en) | 1987-08-12 |
Family
ID=4801013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86100425 Pending CN86100425A (en) | 1986-01-24 | 1986-01-24 | Silicon nitride ceramic material of high flexibility sintered under normal pressure and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86100425A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061639C (en) * | 1997-09-05 | 2001-02-07 | 中国科学院新疆物理研究所 | Microwave sintering insulator for electronic oxide ceramic |
| WO2006074595A1 (en) * | 2005-01-14 | 2006-07-20 | Genfa Li | Eutectic powders for ceramics production and weld and method of producing the same |
| CN102838360A (en) * | 2012-09-12 | 2012-12-26 | 首钢总公司 | Composite fireproof material and preparation method thereof |
| CN103787663A (en) * | 2014-02-25 | 2014-05-14 | 丽水桉阳生物科技有限公司 | Multiphase high-strength high-thermal conductivity silicon nitride ceramic cutter material and cutter |
| CN105272268A (en) * | 2015-11-23 | 2016-01-27 | 彭建国 | Ultra-hard ceramic bulletproof piece and preparation method thereof |
| CN106588030A (en) * | 2016-12-14 | 2017-04-26 | 苏州耐思特塑胶有限公司 | High-toughness ceramic material and preparation method thereof |
| CN110271083A (en) * | 2019-04-28 | 2019-09-24 | 太原科技大学 | A method of deflector roll is manufactured with silicon nitride ceramics |
-
1986
- 1986-01-24 CN CN 86100425 patent/CN86100425A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061639C (en) * | 1997-09-05 | 2001-02-07 | 中国科学院新疆物理研究所 | Microwave sintering insulator for electronic oxide ceramic |
| WO2006074595A1 (en) * | 2005-01-14 | 2006-07-20 | Genfa Li | Eutectic powders for ceramics production and weld and method of producing the same |
| CN101102977B (en) * | 2005-01-14 | 2010-10-27 | 李根法 | Eutectic powder additive for ceramics production or weld and method for preparing the same |
| CN102838360A (en) * | 2012-09-12 | 2012-12-26 | 首钢总公司 | Composite fireproof material and preparation method thereof |
| CN103787663A (en) * | 2014-02-25 | 2014-05-14 | 丽水桉阳生物科技有限公司 | Multiphase high-strength high-thermal conductivity silicon nitride ceramic cutter material and cutter |
| CN105272268A (en) * | 2015-11-23 | 2016-01-27 | 彭建国 | Ultra-hard ceramic bulletproof piece and preparation method thereof |
| CN105272268B (en) * | 2015-11-23 | 2018-05-01 | 富耐克超硬材料股份有限公司 | Ultra hard ceramic ballistic resistant sheet and preparation method thereof |
| CN106588030A (en) * | 2016-12-14 | 2017-04-26 | 苏州耐思特塑胶有限公司 | High-toughness ceramic material and preparation method thereof |
| CN110271083A (en) * | 2019-04-28 | 2019-09-24 | 太原科技大学 | A method of deflector roll is manufactured with silicon nitride ceramics |
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| WD01 | Invention patent application deemed withdrawn after publication |