-
1.发明申请METHOD OF MAKING LARGE CROSS-SECTION INJECTION MOLDED OR SLIP CAST CERAMICS SHAPES 审中-公开制造大型交叉注塑成型或滑动陶瓷形状的方法
公开(公告)号：WO1991011407A1
公开(公告)日：1991-08-08
申请号：PCT/US1991000498
申请日：1991-01-24
Applicant: GTE LABORATORIES INCORPORATED
Inventor： GTE LABORATORIES INCORPORATED , BANDYOPADHYAY, Gautam , LIEBERMAN, Sheldon , FRENCH, Kenneth
IPC: C04B33/28
CPC classification number: C04B35/593 , C04B35/6455
Abstract: A method of producing crack free ceramic parts having large cross-sections is disclosed. An initial mixture of ceramic powder containing a binder and from 0.1 v/o to 10 v/o of whiskers or fibers which are made of carbon, graphite or high temperature melting or decomposition point organic polymers. The mixture is either injection molded or slip cast to form a shaped article. The shaped article is heated in a nitrogen atmosphere to a temperature of 450 DEG C and then in an atmosphere of air at a temperature of 450 DEG C to 600 DEG C to completely remove the binder. The resulting binderless shaped article is then heated at 800 DEG C for a period of time sufficient to completely remove the whiskers or fibers from the shaped articles. The article is then encapsulated in glass and hot isostatically pressed at a pressure of 30,000 psi to densify the article to approximately 99 % of theoritical. The resulting article has a complex geometry and a large cross-section but without detrimental cracks.
Abstract translation: 公开了一种制造具有大截面的无裂纹陶瓷部件的方法。 含有粘合剂和0.1v / o至10v / o的由碳，石墨或高温熔点或分解点有机聚合物制成的晶须或纤维的陶瓷粉末的初始混合物。 混合物是注射成型或滑模以形成成形制品。 将成形制品在氮气气氛中加热至450℃的温度，然后在450℃至600℃的空气气氛中加热，以完全除去粘合剂。 然后将得到的无粘合剂成型制品在800℃下加热足以从成型制品中完全除去晶须或纤维的时间。 然后将制品封装在玻璃中并在30,000psi的压力下进行热等静压，以将制品致密化至约99％的理论。 所得到的制品具有复杂的几何形状和大的横截面，但没有有害的裂纹。
-
2.发明公开METHOD OF MAKING LARGE CROSS-SECTION INJECTION MOLDED OR SLIP CAST CERAMICS SHAPES 失效生产由喷涂或获得注浆形成了大的直径。
公开(公告)号：EP0515574A1
公开(公告)日：1992-12-02
申请号：EP91906871.0
申请日：1991-01-24
Applicant: GTE LABORATORIES INCORPORATED
Inventor： BANDYOPADHYAY, Gautam , LIEBERMAN, Sheldon , FRENCH, Kenneth
CPC classification number: C04B35/593 , C04B35/6455
Abstract: Un procédé permet de produire des pièces en céramique exemptes de fissures ayant une grande section transversale. A cet effet, on moule par injection ou on coule en barbotine un mélange initial de poudre céramique de manière à façonner un article. Le mélange initial de poudre céramique contient un liant et entre 0,1 v/o et 10 v/o de barbes ou de fibres en carbone, en graphite ou en polymère organique à température de fusion ou de décomposition élevée. On chauffe l'article ainsi façonné dans une atmosphère d'azote jusqu'à une température égale à 450 °C, puis dans une atmosphère d'air à une température comprise entre 450 °C et 600 °C afin d'éliminer tout le liant. On chauffe ensuite l'article ainsi obtenu dépourvu de liant à 800 °C pendant une durée suffisante pour éliminer entièrement les barbes ou les fibres de l'article façonné. On renferme l'article dans du verre et on le comprime isostatiquement à chaud à une pression de 30.000 psi afin de condenser l'article jusqu'à environ 99 % de ses dimensions théoriques. L'article ainsi obtenu a une géométrie complexe et une large section transversale mais est dépourvu de fissures nuisibles.
-
3.发明授权METHOD OF MAKING LARGE CROSS-SECTION INJECTION MOLDED OR SLIP CAST CERAMICS SHAPES 失效生产由喷涂或获得注浆形成了大的直径。
公开(公告)号：EP0515574B1
公开(公告)日：1995-09-06
申请号：EP91906871.8
申请日：1991-01-24
Applicant: GTE LABORATORIES INCORPORATED
Inventor： BANDYOPADHYAY, Gautam , LIEBERMAN, Sheldon , FRENCH, Kenneth
CPC classification number: C04B35/593 , C04B35/6455
Abstract: A method of producing crack free ceramic parts having large cross-sections is disclosed. An initial mixture of ceramic powder containing a binder and from 0.1 v/o to 10 v/o of whiskers or fibers which are made of carbon, graphite or high temperature melting or decomposition point organic polymers. The mixture is either injection molded or slip cast to form a shaped article. The shaped article is heated in a nitrogen atmosphere to a temperature of 450 °C and then in an atmosphere of air at a temperature of 450 °C to 600 °C to completely remove the binder. The resulting binderless shaped article is then heated at 800 °C for a period of time sufficient to completely remove the whiskers or fibers from the shaped articles. The article is then encapsulated in glass and hot isostatically pressed at a pressure of 30,000 psi to densify the article to approximately 99 % of theoritical. The resulting article has a complex geometry and a large cross-section but without detrimental cracks.
-
-
Search Results
3
records
(took 0.021 seconds)
