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    Method for making machinable abrasive greenware
    61.
    发明授权
    Method for making machinable abrasive greenware 失效
    制造可加工磨料绿色软件的方法

    公开(公告)号：US5135545A

    公开(公告)日：1992-08-04

    申请号：US673622

    申请日：1991-03-22

    Applicant: Aleksander J. Pyzik ,  Jack J. Ott

    Inventor： Aleksander J. Pyzik ,  Jack J. Ott

    IPC: B24D3/34 ,  B24D18/00 ,  C09K3/14

    CPC classification number: C09K3/1427 ,  B24D18/0009 ,  B24D3/344

    Abstract: The present invention employs poly(ethyloxazoline) as a temporary binder and lubricant during the preparation of greenware articles. According to the present invention, molten poly(ethyloxazoline) promotes the compressibility of the powder used to form the greenware article, thus improving the density and strength of both the greenware and the abrasive article. The molten poly(ethyloxazoline) acts as a lubricant to permit a more efficient grain rearrangement under applied pressure and thereby increases the average density of the greenware article by 6 to 8 percent as compared to standard cold pressing.

    Abstract translation: 本发明在制备绿色物品时使用聚（乙基恶唑啉）作为临时粘合剂和润滑剂。 根据本发明，熔融聚（乙基恶唑啉）促进了用于形成生物制品的粉末的压缩性，从而提高了绿色制品和磨料制品的密度和强度。 熔融的聚（乙基恶唑啉）作为润滑剂，以在施加的压力下更有效地进行晶粒重排，从而将绿色制品的平均密度与标准冷压相比增加6％至8％。

    B4C/Al cermets and method for making same
    62.
    发明授权
    B4C/Al cermets and method for making same 失效
    B4C / Al金属陶瓷及其制造方法

    公开(公告)号：US5039633A

    公开(公告)日：1991-08-13

    申请号：US407393

    申请日：1989-09-14

    Applicant: Aleksander J. Pyzik ,  Robert T. Nilsson

    Inventor： Aleksander J. Pyzik ,  Robert T. Nilsson

    IPC: B22F3/26 ,  C04B35/65 ,  C04B41/50 ,  C04B41/51 ,  C04B41/87 ,  C04B41/88 ,  C22C1/10 ,  C22C29/00 ,  C22C29/02 ,  C22C29/06

    CPC classification number: C04B41/009 ,  C04B35/652 ,  C04B41/507 ,  C04B41/515 ,  C04B41/5155 ,  C04B41/87 ,  C04B41/88 ,  C22C1/1036 ,  C22C29/062

    Abstract: Reactive ceramic-metal compositions are described that include a ceramic phase of at least 70 percent by volume, 95 percent of theoretical density and a metal phase that retains its chemical reactivity with the ceramic phase after the composition has been fully densified. The composition may be heat treated after densification to form additional ceramic phases in a controllable manner. Preferred ceramic metal compositions wherein the metal and ceramic components retain reactivity after densification include boron carbide ceramic and Al or Mg metals. The process employed in forming said compositions requires first forming a sintered porous body of the ceramic material followed by contacting with the metal component, which may be in chip or solid bar form. The system is then heated to the melting point of the metal and a pressure of at least 200 MPa is employed such that the porous body is filled with metal and the composition is substantially fully densified. Subsequent heating reacts the metal with the ceramic to form additional B-C-metal phases as desired.

    Abstract translation: 描述了活性陶瓷 - 金属组合物，其包括至少70体积％，理论密度的95％的陶瓷相和在组合物完全致密化后保持其与陶瓷相的化学反应性的金属相。 组合物可以在致密化之后进行热处理，以可控的方式形成额外的陶瓷相。 其中金属和陶瓷组分在致密化后保持反应性的优选陶瓷金属组合物包括碳化硼陶瓷和Al或Mg金属。 用于形成所述组合物的方法需要首先形成陶瓷材料的烧结多孔体，然后与金属组分接触，金属组分可以是片状或固体棒形式。 然后将该系统加热到金属的熔点，并且使用至少200MPa的压力，使得多孔体填充金属并且组合物基本上完全致密化。 随后加热使金属与陶瓷反应，形成额外的B-C金属相。

    Method of preparing a self-reinforced silicon nitride ceramic of high fracture toughness
    63.
    发明授权
    Method of preparing a self-reinforced silicon nitride ceramic of high fracture toughness 失效
    制备高断裂韧性的自增强氮化硅陶瓷的方法

    公开(公告)号：US5021372A

    公开(公告)日：1991-06-04

    申请号：US398801

    申请日：1989-08-25

    Applicant: Aleksander J. Pyzik ,  Douglas B. Schwarz ,  Harold E. Rossow ,  Donald R. Beaman ,  Barbara M. Pyzik ,  William J. Dubensky

    Inventor： Aleksander J. Pyzik ,  Douglas B. Schwarz ,  Harold E. Rossow ,  Donald R. Beaman ,  Barbara M. Pyzik ,  William J. Dubensky

    IPC: C04B35/593 ,  C04B35/645 ,  C04B35/80

    CPC classification number: C04B35/645 ,  C04B35/593 ,  C04B35/806

    Abstract: A process for preparing a self-reinforced silicon nitride ceramic body of high fracture toughness comprising hot-pressing a powder mixture containing silicon nitride, a densification aid such as sodium oxide, a conversion aid such as lanthanum oxide and a compound, such as gallium oxide, which enhances growth of .beta.-silicon nitride whiskers-under conditions such that densification and the in situ formation of .beta.-silicon nitride whiskers having a high aspect ratio occur. A novel silicon nitride ceramic of high fracture toughness and high fracture strength is disclosed comprising a .beta.-silicon nitride crystalline phase wherein at least about 20 volume percent of the phase is in the form of whiskers having an average aspect ratio of at least about 2.5; a glassy second phase containing the densification aid, the conversion aid, the compound which enhances growth of .beta.-silicon nitride whiskers, and an amount of silica; and not greater than about 10 weight percent of the total weight as other phases. The glassy phase may also include a minor amount, e.g., up to 5.0 weight percent, based upon total weight of the ceramic, of aluminum nitride or boron nitride.

    Abstract translation: 一种制备高断裂韧性的自增强氮化硅陶瓷体的方法，包括热压含有氮化硅的粉末混合物，致密化助剂例如氧化钠，转化助剂如氧化镧和化合物如氧化镓 ，其增强了β-硅氮化物晶须的生长 - 在使得具有高纵横比的β-硅氮化物晶须的致密化和原位形成的条件下。 公开了一种具有高断裂韧性和高断裂强度的新型氮化硅陶瓷，其包括β-氮化硅结晶相，其中该相的至少约20体积百分数为晶须的形式，其平均纵横比为至少约2.5; 含有致密化助剂的玻璃质第二相，转化助剂，增强β-硅氮化物晶须生长的化合物和一定量的二氧化硅; 并且不大于作为其它相的总重量的约10重量％。 玻璃相还可以包括少量，例如，基于陶瓷的总重量，至多5.0重量％的氮化铝或氮化硼。

    Self-reinforced silicon nitride ceramic of high fracture toughness
    64.
    发明授权
    Self-reinforced silicon nitride ceramic of high fracture toughness 失效
    自增强氮化硅陶瓷具有高断裂韧性

    公开(公告)号：US4919689A

    公开(公告)日：1990-04-24

    申请号：US290720

    申请日：1989-02-28

    Applicant: Aleksander J. Pyzik ,  Douglas B. Schwarz ,  William J. Dubensky ,  Donald R. Beaman

    Inventor： Aleksander J. Pyzik ,  Douglas B. Schwarz ,  William J. Dubensky ,  Donald R. Beaman

    IPC: C04B35/593 ,  C04B35/645 ,  C04B35/80

    CPC classification number: C04B35/806 ,  C04B35/593 ,  C04B35/645

    Abstract: A process for preparing a self-reinforced silicon nitride ceramic body of high fracture toughness comprising hot-pressing a powder mixture containing silicon nitride, magnesium oxide, yttrium oxide and calcium oxide under conditions such that densification and the in situ formation of .beta.-silicon nitride whiskers having a high aspect ratio occur. A novel silicon nitride ceramic of high fracture toughness is disclosed comprising a .beta.-silicon nitride crystalline phase wherein at least about 20 volume percent of the phase is in the form of whiskers having an average aspect ratio of at least about 2.5; a glassy second phase containing magnesium oxide, yttrium oxide, calcium oxide, and silica in a total amount not greater than about 35 weight percent; and not greater than about 10 weight percent of the total weight as other phases.

    Abstract translation: 一种制备高断裂韧性的自增强氮化硅陶瓷体的方法，其包括在使得致密化和原位形成β-氮化硅的条件下热压含有氮化硅，氧化镁，氧化钇和氧化钙的粉末混合物 发生具有高纵横比的晶须。 公开了一种具有高断裂韧性的新型氮化硅陶瓷，其包括β-硅氮化物结晶相，其中该相的至少约20体积％为具有至少约2.5的平均纵横比的晶须形式; 含有不大于约35重量％的氧化镁，氧化钇，氧化钙和二氧化硅的玻璃状第二相; 并且不大于作为其它相的总重量的约10重量％。

    Self-reinforced silicon nitride ceramic of high fracture toughness and a method of preparing the same
    65.
    发明授权
    Self-reinforced silicon nitride ceramic of high fracture toughness and a method of preparing the same 失效
    具有高断裂韧性的自增强氮化硅陶瓷及其制备方法

    公开(公告)号：US4883776A

    公开(公告)日：1989-11-28

    申请号：US148748

    申请日：1988-01-27

    Applicant: Aleksander J. Pyzik ,  William J. Dubensky ,  Douglas B. Schwarz ,  Donald R. Beaman

    Inventor： Aleksander J. Pyzik ,  William J. Dubensky ,  Douglas B. Schwarz ,  Donald R. Beaman

    IPC: C04B35/584 ,  C04B35/593 ,  C04B35/645 ,  C04B35/80 ,  C04B35/81

    CPC classification number: C04B35/806 ,  C04B35/593 ,  C04B35/645

    Abstract: A process for preparing a self-reinforced silicon nitride ceramic body of high fracture toughness comprising hot-pressing a powder mixture containing silicon nitride, magnesium oxide, yttrium oxide and calcium oxide under conditions such that densification and the in situ formation of .beta.-silicon nitride whiskers having a high aspect ratio occur. A novel silicon nitride ceramic of high fracture toughness is disclosed comprising a .beta.-silicon nitride crystalline phase wherein at least about 20 volume percent of the phase is in the form of whiskers having an average aspect ratio of at least about 2.5; a glassy second phase containing magnesium oxide, yttrium oxide, calcium oxide, and silica in a total amount not greater than about 35 weight percent; and not greater than about 10 weight percent of the total weight as other phases.

    Abstract translation: 一种制备高断裂韧性的自增强氮化硅陶瓷体的方法，其包括在使得致密化和原位形成β-氮化硅的条件下热压含有氮化硅，氧化镁，氧化钇和氧化钙的粉末混合物 发生具有高纵横比的晶须。 公开了一种具有高断裂韧性的新型氮化硅陶瓷，其包括β-硅氮化物结晶相，其中该相的至少约20体积％为具有至少约2.5的平均纵横比的晶须形式; 含有不大于约35重量％的氧化镁，氧化钇，氧化钙和二氧化硅的玻璃状第二相; 并且不大于作为其它相的总重量的约10重量％。

    Method for making porous acicular mullite-containing composites
    66.
    发明授权
    Method for making porous acicular mullite-containing composites 有权
    制备多孔针状富含莫来石的复合材料的方法

    公开(公告)号：US08871676B2

    公开(公告)日：2014-10-28

    申请号：US13059990

    申请日：2009-09-18

    Applicant: Daniel Grohol ,  Chan Han ,  Aleksander J. Pyzik

    Inventor： Daniel Grohol ,  Chan Han ,  Aleksander J. Pyzik

    IPC: B01J23/00 ,  B01J21/00 ,  C04B35/195 ,  C04B41/50 ,  C04B35/185

    CPC classification number: C04B35/195 ,  C04B35/185 ,  C04B41/5025 ,  C04B2235/3463 ,  C04B2235/3481

    Abstract: Porous composites of mullite and cordierite are formed by firing an acicular mullite body in the presence of a magnesium source and a silicon source. In some variations of the process, the magnesium and silicon sources are present when the acicular mullite body is formed. In other variations, the magnesium source and the silicon source are applied to a previously-formed acicular mullite body. Surprisingly, the composites have coefficients of linear thermal expansion that are intermediate to those of mullite and cordierite alone, and have higher fracture strengths than cordierite at a similar porosity. Some of the cordierite forms at grain boundaries and/or points of intersection between mullite needles, rather than merely coating the needles. The presence of magnesium and silicon sources during acicular mullite formation does not significantly affect the ability to produce a highly porous network of mullite needles.

    Abstract translation: 莫来石和堇青石的多孔复合材料是通过在镁源和硅源的存在下焙烧针状莫来石体形成的。 在该方法的一些变型中，当形成针状莫来石体时，存在镁和硅源。 在其它变型中，将镁源和硅源施加到预先形成的针状莫来石体上。 令人惊奇的是，复合材料的线性热膨胀系数与莫来石和堇青石单体的中间相似，并且具有比类似孔隙率的堇青石更高的断裂强度。 在莫来石针之间的晶界和/或交叉点处的一些堇青石形式，而不仅仅是涂覆针。 在针状莫来石形成过程中镁和硅源的存在并不会显着影响产生莫来石针的高度多孔网络的能力。

    Aluminum boron carbide composite and method to form said composite
    68.
    发明授权
    Aluminum boron carbide composite and method to form said composite 有权
    铝碳化硼复合材料和形成所述复合材料的方法

    公开(公告)号：US08580185B2

    公开(公告)日：2013-11-12

    申请号：US13223337

    申请日：2011-09-01

    Applicant: Aleksander J. Pyzik ,  Robert A. Newman ,  Mark A. Chartier ,  Amy M. Wetzel ,  Christopher N. Haney

    Inventor： Aleksander J. Pyzik ,  Robert A. Newman ,  Mark A. Chartier ,  Amy M. Wetzel ,  Christopher N. Haney

    IPC: C04B41/88 ,  C04B35/563

    CPC classification number: C04B35/563 ,  C04B2235/3821 ,  C04B2235/402 ,  C04B2235/5436 ,  C04B2235/661

    Abstract: An improved aluminum-boron carbide (ABC) composite has been discovered that is comprised of a continuous network of AlB24C4 and boron carbide grains having therein other isolated aluminum-boron carbide reactive phases and at most 2% by volume of isolated metal. The improved ABC composite may be formed by forming boron carbide particulates into a porous body that has a porosity of at most about 35%, where the boron particulates have been heat treated to a temperature of 1200° C. to 1800° C., infiltrating the porous body with aluminum or aluminum alloy until an infiltrated aluminum-boron carbide body is formed that has at most about 1% porosity, heat treating the infiltrated body for at least 25 hours at 1000° C. to 1100° C. to form an aluminum boron carbide composite having a continuous network of AlB24C4 and boron carbide, and subsequently heat-treating to 700° C. to 900° C. to form the improved aluminum boron carbide composite.

    Abstract translation: 已经发现了一种改进的碳化铝 - 碳化硼（ABC）复合材料，其由AlB24C4和碳化硼晶粒的连续网络组成，其中具有其它隔离的铝 - 碳化硼反应相和至多2体积％的隔离金属。 改进的ABC复合材料可以通过将碳化硼颗粒形成多孔体而形成，所述多孔体具有至多约35％的孔隙率，其中硼微粒被热处理至1200℃至1800℃，渗透 具有铝或铝合金的多孔体，直到形成渗透的铝 - 碳化硼体，其具有至多约1％的孔隙率，在1000℃至1100℃下将渗透体热处理至少25小时，以形成 铝碳化硼复合材料，其具有AlB24C4和碳化硼的连续网络，并随后热处理至700℃至900℃以形成改进的碳化硼复合材料。

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