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1. 发明授权

US5643843A Silicon nitride/silicon carbide composite densified materials prepared using composite powders 失效
标题翻译：使用复合粉末制备的氮化硅/碳化硅复合致密材料
公开(公告)号：US5643843A
公开(公告)日：1997-07-01
申请号：US678199
申请日：1996-07-12
申请人： Stephen D. Dunmead , Alan W. Weimer , Daniel F. Carroll , Glenn A. Eisman , Gene A. Cochran , David W. Susnitzky , Donald R. Beaman , Kevin J. Nilsen
发明人： Stephen D. Dunmead , Alan W. Weimer , Daniel F. Carroll , Glenn A. Eisman , Gene A. Cochran , David W. Susnitzky , Donald R. Beaman , Kevin J. Nilsen
IPC分类号： C04B35/565 , C01B21/068 , C04B35/584 , C04B35/593 , C04B35/626 , C04B35/577 , C04B35/596
CPC分类号： B82Y30/00 , C01B21/0685 , C04B35/584 , C04B35/593 , C01P2004/62 , C01P2004/64 , C01P2006/10 , C01P2006/12
摘要： Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.
摘要翻译：通过结晶二氧化硅粉末，碳粉末和任选的结晶氮化硅粉末的碳热还原制备氮化硅 - 碳化硅复合粉末。复合粉末的结晶碳化硅部分具有小于约700纳米的平均数直径，并含有氮。复合粉末可用于制备烧结陶瓷体和自增强氮化硅陶瓷体。

2. 发明授权

US5227346A Sialon composites and method of preparing the same 失效
标题翻译：赛隆复合材料及其制备方法
公开(公告)号：US5227346A
公开(公告)日：1993-07-13
申请号：US847522
申请日：1992-03-06
申请人： Chinmau J. Hwang , Donald R. Beaman
发明人： Chinmau J. Hwang , Donald R. Beaman
IPC分类号： C04B35/599 , C04B35/597
CPC分类号： C04B35/597
摘要： This invention is a multi-phase SiAlON composite having a first alpha-SiAlON phase prepared from a multi-cationic mixture including oxides and nitrides of strontium, at least one of yttrium or a rare earth metal, and at least one other metal such as Ca, Mg, Li or Na. The composite also has a second phase of beta-SiAlON, and a material of a third phase of intergranular amorphous morphology including Si, Al, O, and N combined with a mixture of strontium, at least one of Ca, Mg, Li or Na and at least one of yttrium or a rare earth element. The multi-phase SiAlON exhibits excellent strength, fracture toughness, hardness, creep resistance and oxidation resistance. The material is useful for high wear, high temperature machine or engine components and tools.
摘要翻译：本发明是一种多相SiAlON复合材料，其具有由多阳离子混合物制备的第一α-SiAlON相，该多阳离子混合物包括锶，钇或稀土金属中的至少一种和至少一种其它金属如Ca ，Mg，Li或Na。所述复合材料还具有β-SiAlON的第二相，以及包括Si，Al，O和N的晶间无定形形态的第三相的材料，其与锶，Ca，Mg，Li或Na中的至少一种的混合物以及钇或稀土元素中的至少一种。多相SiAlON表现出优异的强度，断裂韧性，硬度，抗蠕变性和抗氧化性。该材料适用于高磨损，高温机器或发动机部件和工具。

3. 发明授权

US5160508A Self-reinforced silicon nitride ceramic of high fracture toughness 失效
$Self-reinforced silicon nitride ceramic of high fracture toughness$
标题翻译：自增强氮化硅陶瓷具有高断裂韧性
公开(公告)号：US5160508A
公开(公告)日：1992-11-03
申请号：US826315
申请日：1992-01-24
申请人： Aleksander J. Pyzik , Harold E. Rossow , Douglas B. Schwarz , Donald R. Beaman , Barbara M. Pyzik , William J. Dubensky
发明人： Aleksander J. Pyzik , Harold E. Rossow , Douglas B. Schwarz , Donald R. Beaman , Barbara M. Pyzik , William J. Dubensky
IPC分类号： C04B35/593 , C04B35/645 , C04B35/80
CPC分类号： C04B35/593 , C04B35/645 , C04B35/806
摘要： 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 densificaton 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. The glassy phase optionally includes an amount of a secondary reinforcing material such as silicon carbide whiskers.
摘要翻译：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。玻璃相任选地包括一定量的第二增强材料，例如碳化硅晶须。

4. 发明授权

US5021372A Method of preparing a self-reinforced silicon nitride ceramic of high fracture toughness 失效
$Method of preparing a self-reinforced silicon nitride ceramic of high fracture toughness$
标题翻译：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
申请人： Aleksander J. Pyzik , Douglas B. Schwarz , Harold E. Rossow , Donald R. Beaman , Barbara M. Pyzik , William J. Dubensky
发明人： Aleksander J. Pyzik , Douglas B. Schwarz , Harold E. Rossow , Donald R. Beaman , Barbara M. Pyzik , William J. Dubensky
IPC分类号： C04B35/593 , C04B35/645 , C04B35/80
CPC分类号： C04B35/645 , C04B35/593 , C04B35/806
摘要： 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.
摘要翻译：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。

5. 发明授权

US4919689A Self-reinforced silicon nitride ceramic of high fracture toughness 失效
$Self-reinforced silicon nitride ceramic of high fracture toughness$
标题翻译：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
申请人： Aleksander J. Pyzik , Douglas B. Schwarz , William J. Dubensky , Donald R. Beaman
发明人： Aleksander J. Pyzik , Douglas B. Schwarz , William J. Dubensky , Donald R. Beaman
IPC分类号： C04B35/593 , C04B35/645 , C04B35/80
CPC分类号： C04B35/806 , C04B35/593 , C04B35/645
摘要： 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.
摘要翻译：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％。

6. 发明授权

US4883776A Self-reinforced silicon nitride ceramic of high fracture toughness and a method of preparing the same 失效
$Self-reinforced silicon nitride ceramic of high fracture toughness and a method of preparing the same$
标题翻译：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
申请人： Aleksander J. Pyzik , William J. Dubensky , Douglas B. Schwarz , Donald R. Beaman
发明人： Aleksander J. Pyzik , William J. Dubensky , Douglas B. Schwarz , Donald R. Beaman
IPC分类号： C04B35/584 , C04B35/593 , C04B35/645 , C04B35/80 , C04B35/81
CPC分类号： C04B35/806 , C04B35/593 , C04B35/645
摘要： 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.
摘要翻译：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％。

7. 发明授权

US5525556A Silicon nitride/silicon carbide composite powders 失效
标题翻译：氮化硅/碳化硅复合粉末
公开(公告)号：US5525556A
公开(公告)日：1996-06-11
申请号：US484539
申请日：1995-06-07
申请人： Stephen D. Dunmead , Alan W. Weimer , Daniel F. Carroll , Glenn A. Eisman , Gene A. Cochran , David W. Susnitzky , Donald R. Beaman , Kevin J. Nilsen
发明人： Stephen D. Dunmead , Alan W. Weimer , Daniel F. Carroll , Glenn A. Eisman , Gene A. Cochran , David W. Susnitzky , Donald R. Beaman , Kevin J. Nilsen
IPC分类号： C04B35/565 , C01B21/068 , C04B35/584 , C04B35/593 , C04B35/626 , C04B35/596 , C04B35/577
CPC分类号： B82Y30/00 , C01B21/0685 , C04B35/584 , C04B35/593 , C01P2004/62 , C01P2004/64 , C01P2006/10 , C01P2006/12
摘要： Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.
摘要翻译：通过结晶二氧化硅粉末，碳粉末和任选的结晶氮化硅粉末的碳热还原制备氮化硅 - 碳化硅复合粉末。复合粉末的结晶碳化硅部分具有小于约700纳米的平均数直径，并含有氮。复合粉末可用于制备烧结陶瓷体和自增强氮化硅陶瓷体。

8. 发明授权

US5595622A Method of making a boron carbide cermet with an aluminum oxide layer 失效
标题翻译：制造具有氧化铝层的碳化硼金属陶瓷的方法
公开(公告)号：US5595622A
公开(公告)日：1997-01-21
申请号：US574871
申请日：1995-12-19
申请人： Aleksander J. Pyzik , Sharon M. Fuller , Donald R. Beaman
发明人： Aleksander J. Pyzik , Sharon M. Fuller , Donald R. Beaman
IPC分类号： B22D19/00 , C04B35/65 , C04B41/51 , C04B41/52 , C04B41/88 , C04B41/89 , C22C1/05 , C22C1/10 , C22C29/06 , C22C29/14 , B32B9/00
CPC分类号： C04B41/009 , C04B35/65 , C04B41/5155 , C04B41/52 , C04B41/88 , C04B41/89 , C22C1/058 , C22C1/1068 , C22C29/14 , C04B2111/00931 , Y10T428/12167
摘要： Prepare boron carbide-aluminum structural composites by infiltrating molten aluminum or aluminum alloy into a porous preform that is either unbaked or baked at a temperature of up to 1800.degree. C. to form a densified cermet and then heat treat the cermet in air or an oxygen-containing atmosphere to form a dense outer surface layer of aluminum oxide. The resulting structural cermets can withstand prolonged exposure to temperatures above the melting point of aluminum without suffering undue degradation of physical properties such as flexure strength.
摘要翻译：通过将熔融的铝或铝合金浸入多孔预制件中制备碳化硼 - 铝结构复合材料，该多孔预制件在高达1800℃的温度下未烘烤或烘烤，形成致密的金属陶瓷，然后在空气或氧气中热处理金属陶瓷以形成氧化铝致密的外表面层。所得到的结构金属陶瓷可以经受长时间暴露于高于铝熔点的温度，而不会受到物理性能（例如挠曲强度）的过度降解。

9. 发明授权

US5508120A Boron carbide cermet structural materials with high flexure strength at elevated temperatures 失效
标题翻译：在高温下具有高挠曲强度的碳化硼金属陶瓷结构材料
公开(公告)号：US5508120A
公开(公告)日：1996-04-16
申请号：US289967
申请日：1994-08-12
申请人： Aleksander J. Pyzik , Sharon M. Fuller , Donald R. Beaman
发明人： Aleksander J. Pyzik , Sharon M. Fuller , Donald R. Beaman
IPC分类号： B22D19/00 , C04B35/65 , C04B41/51 , C04B41/52 , C04B41/88 , C04B41/89 , C22C1/05 , C22C1/10 , C22C29/06 , C22C29/14 , B32B9/00
CPC分类号： C04B41/009 , C04B35/65 , C04B41/5155 , C04B41/52 , C04B41/88 , C04B41/89 , C22C1/058 , C22C1/1068 , C22C29/14 , C04B2111/00931 , Y10T428/12167
摘要： Prepare boron carbide-aluminum structural composites by infiltrating molten aluminum or aluminum alloy into a porous preform that is either unbaked or baked at a temperature of up to 1800.degree. C. to form a densified cermet and then heat treat the cermet in air or an oxygen-containing atmosphere to form a dense outer surface layer of aluminum oxide. The resulting structural cermets can withstand prolonged exposure to temperatures above the melting point of aluminum without suffering undue degradation of physical properties such as flexure strength.
摘要翻译：通过将熔融的铝或铝合金浸入多孔预制件中制备碳化硼 - 铝结构复合材料，该多孔预制件在高达1800℃的温度下未烘烤或烘烤，形成致密的金属陶瓷，然后在空气或氧气中热处理金属陶瓷以形成氧化铝致密的外表面层。所得到的结构金属陶瓷可以经受长时间暴露于高于铝熔点的温度，而不会受到物理性能（例如挠曲强度）的过度降解。

10. 发明授权

US5538675A Method for producing silicon nitride/silicon carbide composite 失效
标题翻译：氮化硅/碳化硅复合材料的制造方法
公开(公告)号：US5538675A
公开(公告)日：1996-07-23
申请号：US227751
申请日：1994-04-14
申请人： Stephen D. Dunmead , Alan W. Weimer , Daniel F. Carroll , Glenn A. Eisman , Gene A. Cochran , David W. Susnitzky , Donald R. Beaman , Kevin J. Nilsen
发明人： Stephen D. Dunmead , Alan W. Weimer , Daniel F. Carroll , Glenn A. Eisman , Gene A. Cochran , David W. Susnitzky , Donald R. Beaman , Kevin J. Nilsen
IPC分类号： C04B35/565 , C01B21/068 , C04B35/584 , C04B35/593 , C04B35/626 , C01B31/00 , C04B35/64
CPC分类号： B82Y30/00 , C01B21/0685 , C04B35/584 , C04B35/593 , C01P2004/62 , C01P2004/64 , C01P2006/10 , C01P2006/12
摘要： Silicon carbide/silicon nitride composites are prepared by carbothermal reduction of crystalline silica powder, carbon powder and optionally crsytalline silicon nitride powder. The crystalline silicon carbide portion of the composite has a mean number diameter less than about 700 nanometers and contains nitrogen.
摘要翻译：碳化硅/氮化硅复合材料是通过结晶二氧化硅粉末，碳粉末和任选的CrSytalline氮化硅粉末的碳热还原来制备的。复合材料的结晶碳化硅部分具有小于约700纳米的平均数直径并含有氮。

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