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    Synthetic gasket materials for use in high-pressure presses
    1.
    发明授权
    Synthetic gasket materials for use in high-pressure presses 失效
    用于高压压机的合成垫片材料

    公开(公告)号：US5858525A

    公开(公告)日：1999-01-12

    申请号：US874769

    申请日：1997-06-13

    申请人： Lan Carter ,  Xian Yao ,  Ghanshyam Rai

    发明人： Lan Carter ,  Xian Yao ,  Ghanshyam Rai

    IPC分类号： B01J3/06 ,  B30B11/00 ,  B32B5/16 ,  B22F1/00 ,  C22C29/12

    CPC分类号： B30B11/004 ,  B01J3/06 ,  B30B11/007 ,  Y10T428/252 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/259 ,  Y10T428/26

    摘要： A synthetic gasket material for use in a high-pressure press includes a major proportion of clay mineral powder having sufficient lubricity to flow in a high-pressure press, a minor proportion of at least one hard material powder having a sufficiently greater hardness than the clay mineral to retard flow of the clay mineral and form a seal during pressing in a high-pressure press, and a sufficient amount of binder to form an integral body. The synthetic gasket material is formed by thoroughly mixing together in desired proportions the clay mineral, hard material, and binder. The mixture is compacted into a body near net geometry and having a desired configuration to facilitate use in the high-pressure press. The compacted body is heated for a sufficient time and at a sufficient temperature to remove non-crystallographic water. A synthetic gasket material prepared according to principles of this invention displays improved flow, pressure transmitting, and thermal insulating properties when compared with gasket material made from natural pyrophyllite, due to the improved compositional consistency, i.e., lack of impurities and consistently low moisture content, of the synthetic gasket material.

    摘要翻译： 用于高压压机的合成垫圈材料包括主要部分的粘土矿物粉末具有足够的润滑性以在高压压力机中流动，少量的至少一种硬质材料粉末具有比粘土足够大的硬度 矿物，以阻止粘土矿物的流动并在高压压机中压制期间形成密封，以及足够量的粘合剂以形成整体。 合成垫片材料通过以所需比例将粘土矿物，硬质材料和粘合剂充分混合在一起形成。 混合物被压实成靠近网状几何体的本体，并且具有期望的构造以便于在高压压机中使用。 将压实体加热足够的时间并在足够的温度下除去非结晶水。 根据本发明原理制备的合成垫圈材料与天然叶蜡石制成的垫圈材料相比，显示出改进的流动性，压力传递和绝热性能，这是由于改进的组合物一致性，即缺乏杂质和始终如一的低含水量， 的合成垫片材料。

    Method of making a polycrystalline cubic boron nitride cutting tool
    2.
    发明授权
    Method of making a polycrystalline cubic boron nitride cutting tool 失效
    制造多晶立方氮化硼切割工具的方法

    公开(公告)号：US5830813A

    公开(公告)日：1998-11-03

    申请号：US792959

    申请日：1997-01-22

    申请人： Xian Yao ,  Matthew W. Collier ,  Madapusi K. Keshavan ,  Ghanshyam Rai

    发明人： Xian Yao ,  Matthew W. Collier ,  Madapusi K. Keshavan ,  Ghanshyam Rai

    IPC分类号： B23B27/14 ,  B24D3/00 ,  B24D18/00 ,  C04B35/5831 ,  C09K3/14 ,  C22C26/00 ,  C04B35/5835

    CPC分类号： C04B35/5831 ,  C09K3/1436 ,  C22C26/00 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： A polycrystalline cubic boron nitride cutting tool is from 50 to 85% by weight cubic boron nitride crystals bonded together as a polycrystalline mass. A supporting phase commingled with the polycrystalline cubic boron nitride is made from 15 to 40% by weight of a refractory material which is preferably titanium carbonitride or titanium aluminum carbonitride. The starting composition also comprises from 4 to 10% by weight of Co.sub.2 Al.sub.9. Mixed powders of these ingredients are treated in ammonia at a temperature in the range of from 1000.degree. to 1250.degree. C., which significantly increases the nitrogen content and reduces carbon content of titanium carbonitride. Instead of mixed powders of the starting materials, coated particles may be used such as cubic boron nitride coated with titanium carbonitride, or titanium carbonitride coated with cobalt, aluminum or cobalt aluminide. Hexagonal boron nitride may be substituted as a starting material for a portion of the cubic boron nitride.

    摘要翻译： 多晶立方氮化硼切割工具是以多晶体结合在一起的50至85重量％的立方氮化硼晶体。 与多晶立方氮化硼混合的支撑相由15至40重量％的耐火材料制成，耐火材料优选为碳氮化钛或碳氮化钛铝。 起始组合物还包含4至10重量％的Co 2 Al 9。 这些成分的混合粉末在氨水中在1000〜1250℃的温度范围内处理，显着提高了氮含量，降低了碳氮化钛的碳含量。 代替起始材料的混合粉末，可以使用涂覆的颗粒，例如涂覆有碳氮化钛的立方氮化硼或涂覆有钴，铝或钴铝的碳氮化钛。 六方氮化硼可以被取代为一部分立方氮化硼的起始材料。

    Synthesis of polycrystalline cubic boron nitride
    3.
    发明授权
    Synthesis of polycrystalline cubic boron nitride 失效
    多晶立方氮化硼的合成

    公开(公告)号：US5271749A

    公开(公告)日：1993-12-21

    申请号：US970822

    申请日：1992-11-03

    申请人： Ghanshyam Rai ,  Xian Yao

    发明人： Ghanshyam Rai ,  Xian Yao

    IPC分类号： B24D3/06 ,  C04B35/5831 ,  C08J5/14 ,  C22C26/00 ,  C22C29/16 ,  B24D3/00

    CPC分类号： C22C29/16 ,  B24D3/06 ,  C04B35/5831 ,  C22C26/00 ,  B22F2998/00 ,  C22C2026/005

    摘要： A sintered polycrystalline compact of cubic boron nitride is made by forming a mixture of about 45 to 65 percent by weight cubic boron nitride (cBN), from about 30 to 45 percent by weight hexagonal boron nitride (hBN), and from about 2 to 7 percent by weight an aluminum containing material, preferably aluminum nitride, and cobalt aluminide having a melting temperature lower than the melting temperature of cobalt phase. The mixture of cBN crystals, hBN and adjuvant materials is compacted into preforms and subjected to heat treatment in a non-oxidizing atmosphere. The preforms are placed onto a cemented tungsten carbide substrate containing cobalt and subjected to elevated pressure and temperature conditions at which the boron nitride is thermodynamically stable. The elevated pressure and temperature conditions are maintained for a time sufficient to permit the infiltration of a cobalt phase into the cBN matrix and sinter the compact. Typically, the cobalt phase is infiltrated from a tungsten carbide substrate cemented with cobalt phase. The compact is characterized by substantial intercrystalline cBN to cBN bonding, and has superior abrasive wear resistance, chemical resistance, impact resistance, thermal conductivity and stability. Further, the technique produces a sintered cBN compact that can be machined more efficiently by EDM.

    摘要翻译： 通过形成约45至65重量％的立方氮化硼（cBN），约30至45重量％的六方氮化硼（hBN）和约2至7个的混合物制备立方氮化硼的烧结多晶压块 重量百分比含有铝的材料，优选氮化铝，和钴的熔化温度低于钴相的熔融温度。 将cBN晶体，hBN和辅助材料的混合物压实成预制件，并在非氧化气氛中进行热处理。 将预型件放置在含有钴的粘结碳化钨基材上，并经受高压和高温条件，在该条件下氮化硼在热力学上是稳定的。 保持升高的压力和温度条件足以允许钴相渗透到cBN基体中并烧结该压块的时间。 通常，钴相从用钴相粘合的碳化钨基底渗透。 该压坯的特征在于大量的晶间cBN至cBN键合，并且具有优异的耐磨性，耐化学性，耐冲击性，导热性和稳定性。 此外，该技术产生可以通过EDM更有效地加工的烧结cBN压块。

    Polycrystallline cubic boron nitride cutting tool
    4.
    发明授权
    Polycrystallline cubic boron nitride cutting tool 失效
    多晶立方氮化硼切割工具

    公开(公告)号：US5639285A

    公开(公告)日：1997-06-17

    申请号：US440773

    申请日：1995-05-15

    申请人： Xian Yao ,  Matthew W. Collier ,  Madapusi K. Keshavan ,  Ghanshyam Rai

    发明人： Xian Yao ,  Matthew W. Collier ,  Madapusi K. Keshavan ,  Ghanshyam Rai

    IPC分类号： B23B27/14 ,  B24D3/00 ,  B24D18/00 ,  C04B35/5831 ,  C09K3/14 ,  C22C26/00

    CPC分类号： C04B35/5831 ,  C09K3/1436 ,  C22C26/00 ,  Y10T428/2991 ,  Y10T428/2993

    摘要： A polycrystalline cubic boron nitride cutting tool is from 50 to 85% by weight cubic boron nitride crystals bonded together as a polycrystalline mass. A supporting phase commingled with the polycrystalline cubic boron nitride is made from 15 to 40% by weight of a refractory material which is preferably titanium carbonitride or titanium aluminum carbonitride. The starting composition also comprises from 4 to 10% by weight of Co.sub.2 Al.sub.9. Mixed powders of these ingredients are treated in ammonia at a temperature in the range of from 1000.degree. to 1250.degree. C., which significantly increases the nitrogen content and reduces carbon content of titanium carbonitride. Instead of mixed powders of the starting materials, coated particles may be used such as cubic boron nitride coated with titanium carbonitride, or titanium carbonitride coated with cobalt, aluminum or cobalt aluminide. Hexagonal boron nitride may be substituted as a starting material for a portion of the cubic boron nitride.

    摘要翻译： 多晶立方氮化硼切割工具是以多晶体结合在一起的50至85重量％的立方氮化硼晶体。 与多晶立方氮化硼混合的支撑相由15至40重量％的耐火材料制成，耐火材料优选为碳氮化钛或碳氮化钛铝。 起始组合物还包含4至10重量％的Co 2 Al 9。 这些成分的混合粉末在氨水中在1000〜1250℃的温度范围内处理，显着提高了氮含量，降低了碳氮化钛的碳含量。 代替起始材料的混合粉末，可以使用涂覆的颗粒，例如涂覆有碳氮化钛的立方氮化硼或涂覆有钴，铝或钴铝的碳氮化钛。 六方氮化硼可以被取代为一部分立方氮化硼的起始材料。

    Synthesis of polycrystalline cubic boron nitride
    5.
    发明授权
    Synthesis of polycrystalline cubic boron nitride 失效
    多晶立方氮化硼的合成

    公开(公告)号：US5326380A

    公开(公告)日：1994-07-05

    申请号：US966698

    申请日：1992-10-26

    申请人： Xian Yao ,  Ghanshyam Rai

    发明人： Xian Yao ,  Ghanshyam Rai

    IPC分类号： C04B35/583 ,  B24D3/06 ,  C04B35/5831 ,  C22C26/00 ,  B24D3/00

    CPC分类号： C22C26/00 ,  B24D3/06 ,  C04B35/5831 ,  C22C2026/005

    摘要： A sintered polycrystalline compact of cubic boron nitride is made by first forming a mixture of about 30 to 60 percent by weight cubic boron nitride, up to about 50 percent by weight hexagonal boron nitride, and from about 2 to 7 percent by weight adjuvant materials, or sintering aids, comprising an aluminum containing material selected from the group consisting of aluminum, aluminum nitride, or aluminum diboride, and up to 50 percent by weight of nitride, carbide, or carbonitride binder material containing a group IVb, Vb, or VIb transition metal. The mixture of cBN crystals, hBN and other materials is compacted into a preform and subjected to heat treatment in a non-oxidizing atmosphere. The preform is placed onto a cemented tungsten-carbide/cobalt substrate and subjected to elevated pressure and temperature conditions at which cubic boron nitride is thermodynamically stable. The elevated pressure and temperature conditions are maintained for a time sufficient to permit the infiltration of the cobalt into the cBN matrix and sinter the compact. The compact is characterized by substantial intergranular cBN to cBN bonding, and has superior abrasive wear stability, chemical resistance, impact resistance and thermal conductivity.

    摘要翻译： 通过首先形成约30至60重量％的立方氮化硼，至多约50重量％的六方氮化硼和约2至7重量％的辅助材料的混合物来制备立方氮化硼的烧结多晶压块， 或烧结助剂，其包含选自铝，氮化铝或二硼化铝的含铝材料，以及含有IVb，Vb或VIb族转变率的至多50重量％的氮化物，碳化物或碳氮化物粘合剂材料 金属。 将cBN晶体，hBN和其他材料的混合物压实成预成型体，并在非氧化性气氛中进行热处理。 将预成型件放置在粘结的碳化钨/钴基底上，并经受立方氮化硼在热力学上稳定的升高的压力和温度条件。 保持升高的压力和温度条件足以允许钴渗透到cBN基体中并烧结该压块的时间。 该压坯的特征在于晶粒间的cBN至cBN结合，并且具有优异的磨料磨损稳定性，耐化学性，耐冲击性和导热性。

    Polycrystalline cubic boron nitride cutting tool
    7.
    发明授权
    Polycrystalline cubic boron nitride cutting tool 有权
    多晶立方氮化硼切割工具

    公开(公告)号：US06331497B1

    公开(公告)日：2001-12-18

    申请号：US09514476

    申请日：2000-02-28

    申请人： Matthew W. Collier ,  Xian Yao ,  Brian G. Bowers

    发明人： Matthew W. Collier ,  Xian Yao ,  Brian G. Bowers

    IPC分类号： C04B355831

    CPC分类号： C04B41/009 ,  C04B35/5831 ,  C04B41/5155 ,  C04B41/88 ,  Y10T407/27 ,  C04B41/4523 ,  C04B41/457 ,  C04B41/5096

    摘要： The polycrystalline cubic baron nitride cutting tool has a particle size in the range of from 10-17 microns. In addition to CBN, the tool has from 2%-15% by weight of a refractory compound selected from the group consisting of titanium carbonitride, titanium aluminum carbonitride, titanium carbide, titanium nitride, titanium diboride and aluminum diboride. When using one of the carbonitrides, the carbon to nitrogen proportion is preferably in the range of from 30 atomic percent carbon and 70 atomic percent carbon to 70 atomic percent carbon and 30 atomic percent nitrogen, and preferably is about 50/50. In addition, there is an infiltrate containing aluminum and/or silicon. A quantity of diamond crystals more than stoichiometric with the amount of silicon infiltrated is included in the composition for forming silicon carbide. The cutting tool is not formed on a cemented tungsten carbide substrate so is substantially free of cobalt.

    摘要翻译： 多晶立方氮化硼切割工具的粒度范围为10-17微米。 除了CBN之外，该工具还含有选自碳氮化钛，碳氮化钛，碳化钛，氮化钛，二硼化钛和二硼化铝组成的组的2％-15％重量的耐火材料。 当使用碳氮化物之一时，碳与氮的比例优选为碳原子数为30原子％，碳为70原子％，碳为70原子％，氮为30原子％，优选为约50/50。 另外还有含有铝和/或硅的渗透物。 在用于形成碳化硅的组合物中包含大于化学计量的金刚石晶体与渗透的量的量。 切割工具不形成在硬质合金基体上，因此基本上不含钴。