Method and means for producing a ceramic or metallic product for
sintering
    1.
    发明授权
    Method and means for producing a ceramic or metallic product for sintering 失效
    用于制造用于烧结的陶瓷或金属制品的方法和装置

    公开(公告)号:US6066274A

    公开(公告)日:2000-05-23

    申请号:US981706

    申请日:1998-03-23

    摘要: A device including an injection molding tool for use once or a few times for producing a sinterable ceramic and/or metallic product. The device includes at least one first tool part. At least one second tool part is combinable with the at least one first tool part to form a molding space for the product. The second tool part is produced using a wet composition and is made of a readily worked and form-stable material containing pores and admixed heat-conducting particles. A wet composition-enclosing member can engage the first tool part during the production of the second tool part. A unit can be connected to the at least one second tool part and can be arranged with the at least one first tool part for absorbing internal lateral displacement forces arising during squeezing or injection of an injection molding composition. The injection molding tool is adapted to receive an injection molding composition containing a ceramic and/or metallic powder that is introduced into the molding tool with low or medium pressure for forming the product. The pores and the admixed heat-conducting particles conduct away heat generated during the molding and gas trapped in the molding space. The pores also provide a well-balanced porosity for effecting conduction of the gas and, together with a flexibility in the solidified injection molding composition, permit the product to be separated from the tool parts without braking.

    摘要翻译: PCT No.PCT / SE96 / 00819 Sec。 371日期:1998年3月23日 102(e)1998年3月23日PCT PCT 1996年6月24日PCT公布。 出版物WO97 / 01408 日期1997年1月16日一种包括用于生产可烧结陶瓷和/或金属产品一次或几次的注塑工具的装置。 该装置包括至少一个第一工具部件。 至少一个第二工具部分可与至少一个第一工具部件组合以形成产品的模制空间。 第二工具部件使用湿式组合物制造,并且由容纳加工和形成稳定的材料制成,所述材料含有孔和混合的导热颗粒。 在制造第二工具部件期间,湿组合物封闭构件可接合第一工具部件。 单元可以连接到至少一个第二工具部件,并且可以布置有至少一个第一工具部件,用于吸收在注射成型组合物的挤压或注射期间产生的内部横向位移力。 注塑工具适于接收含有陶瓷和/或金属粉末的注塑组合物,该陶瓷和/或金属粉末以低或中等压力被引入模制工具中以形成产品。 孔和混合的导热颗粒导致模制期间产生的热量和捕获在模制空间中的气体。 孔也提供了良好平衡的孔隙度,用于实现气体的传导,并且与凝固的注射成型组合物中的柔性一起允许产品在没有制动的情况下与工具部件分离。

    Method for producing ceramic composite materials containing silicon
oxynitride and zirconium oxide
    2.
    发明授权
    Method for producing ceramic composite materials containing silicon oxynitride and zirconium oxide 失效
    生产含有氧化硅和氧化锆的陶瓷复合材料的方法

    公开(公告)号:US5098623A

    公开(公告)日:1992-03-24

    申请号:US438416

    申请日:1989-11-16

    申请人: Robert Pompe

    发明人: Robert Pompe

    摘要: A new group of ceramic composite materials containing silicon oxynitride (Si.sub.2 N.sub.2 O, O'-phase) and zirconium oxide (ZrO.sub.2) can be prepared using a thermal reaction between zirconium silicate (ZrSiO.sub.4) and silicon nitride powder (Si.sub.3 N.sub.4) supplied completely or partly as silicon powder (Si) which is nitrided to Si.sub.3 N.sub.4 in a nitrogen-containing atmosphere. By adding aluminium oxide or the like, composite compositions with ZrO.sub.2, O'-phase and sialons (silicon aluminium oxynitrides) as main components can be obtained. In the method according to this invention, the raw powder material is prepared, e.g. by concurrent milling and blending to submicron particle size, formed by known technique into a compact, nitrided and sintered to the desired density in nitrogen-containing atmosphere.

    摘要翻译: PCT No.PCT / SE88 / 00296 Sec。 371日期:一九八九年十一月十六日 102(e)日期1989年11月16日PCT提交1988年5月31日PCT公布。 出版物WO88 / 09778 日期:1988年12月15日。可以使用硅酸锆(ZrSiO 4)和氮化硅粉末(Si 3 N 4)之间的热反应制备新的含氮氧化硅(Si 2 N 2 O,O相)和氧化锆(ZrO 2)的陶瓷复合材料 )完全或部分提供为在含氮气氛中氮化为Si 3 N 4的硅粉末(Si)。 通过添加氧化铝等,可以获得作为主要成分的具有ZrO 2,O相和硅铝氧氮(硅铝氧氮化物)的复合组合物。 在根据本发明的方法中,制备原料粉末。 通过将通过已知技术形成的亚微米尺寸的同时研磨和共混成为在含氮气氛中的压实,氮化和烧结至所需密度。

    NOVEL POWDER INJECTION MOULDING FEEDSTOCK SYSTEM AND TECHNOLOGY BASED ON DUAL MAIN BINDER CONCEPT, METHODS AND USES
    3.
    发明申请
    NOVEL POWDER INJECTION MOULDING FEEDSTOCK SYSTEM AND TECHNOLOGY BASED ON DUAL MAIN BINDER CONCEPT, METHODS AND USES 审中-公开
    基于双主要概念,方法和用途的新型粉末注射成型进料系统和技术

    公开(公告)号:US20150232667A1

    公开(公告)日:2015-08-20

    申请号:US14568139

    申请日:2014-12-12

    IPC分类号: C08L91/06 B22F1/00

    摘要: The present invention belongs to the field of technology known as powder injection moulding. It includes producing a part by powder injection moulding at low to high injection pressure and it discloses a novel binder system for optimized feedstock design. The primary subject matter of the invention resides in introducing a secondary main binder into the feedstock binder composition, meeting, simultaneously, the five (5) following criteria: partially soluble in the primary binder, soluble in water, thermally evaporable, possessing a dispersant functionality and increasing the viscosity at near zero feedstock shear rate. In addition to this binder, the feedstock may contain a small fraction of another dispersant and a back-bone polymer when needed, depending on the type of powder material used for the feedstock. Based on the main modes of binder removal (thermal or water extraction) this novel binder system is denominated as Te-Wex™ system. Using this binder concept feedstocks with a wide variety of powders, including alumina, zirconia, silicon nitride, stainless steel and low-alloyed steel could be prepared and subsequently injected using the MPIM (Medium pressure Powder Injection Moulding) technique into one- or multiple cavity tools to make parts of variable thickness. These parts could be debinded either by partial water extraction and/or thermal evaporation and sintered to final density of over 99 vol % of the respective theoretical values.

    摘要翻译: 本发明属于粉末注射成型技术领域。 它包括以低到高的注射压力通过粉末注射成型制备零件,并且公开了一种用于优化原料设计的新型粘合剂体系。 本发明的主要主题在于将次要主要粘合剂引入原料粘合剂组合物中,同时符合五(5)个以下标准:部分可溶于主要粘合剂,可溶于水,热蒸发,具有分散剂功能 并且在近零原料剪切速率下增加粘度。 除了该粘合剂之外,根据用于原料的粉末材料的类型,原料可以在需要时含有一小部分另外的分散剂和背骨聚合物。 基于粘合剂去除(热或水提取)的主要模式,该新型粘合剂系统被称为Te-Wex TM系统。 使用该粘合剂概念,可以制备各种粉末的原料,包括氧化铝,氧化锆,氮化硅,不锈钢和低合金钢,然后使用MPIM(中压粉末注射成型)技术注入一个或多个空腔 工具使部分变厚。 这些部分可以通过部分水提取和/或热蒸发进行剥离,并烧结至相应理论值的99vol%以上的最终密度。

    Process for the production of mouldings from materials based on silicon
nitride
    4.
    发明授权
    Process for the production of mouldings from materials based on silicon nitride 失效
    从基于氮化硅的材料生产模制品的工艺

    公开(公告)号:US4492665A

    公开(公告)日:1985-01-08

    申请号:US463884

    申请日:1983-01-21

    申请人: Robert Pompe

    发明人: Robert Pompe

    CPC分类号: C04B35/584 C04B35/591

    摘要: Process for the production of moulded bodies of materials based on silicon nitride, where the powder mix prepared by way of initial material contains silicon nitride (Si.sub.3 N.sub.4), a high proportion, preferably 40-85 percent by weight, of silicon (Si) and a sintering aid. With conventional sintering the above powder mix is advantageously prepared by grinding of an Si-powder dispersed in an Si.sub.3 N.sub.4 powder the grain size of which is considerably lower than that of the Si-powder. The process covers in the main the production of a body moulded from this powder mix by known moulding methods, nitriding of the Si-content to Si.sub.3 N.sub.4 and sintering of the moulded body to a final required density.

    摘要翻译: PCT No.PCT / SE82 / 00161 Sec。 371日期1983年1月21日 102(e)日期1983年1月21日PCT提交日期为1982年5月10日PCT公布。 出版物WO82 / 04245 日本1982年12月9日。用于生产基于氮化硅的材料成型体的方法,其中通过初始材料制备的粉末混合物含有氮化硅(Si 3 N 4),高比例,优选40-85重量% 的硅(Si)和烧结助剂。 通过常规烧结,上述粉末混合物有利地通过研磨分散在Si3N4粉末中的Si粉末制备,其粒度比Si粉末的晶粒尺寸明显降低。 该方法主要通过已知的成型方法来覆盖由该粉末混合物成型的主体,将Si含量氮化为Si 3 N 4并将成型体烧结至最终所需密度。