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1. 发明授权

US5863850A Process of making zirconia based ceramic material 失效
标题翻译：制造氧化锆基陶瓷材料的工艺
公开(公告)号：US5863850A
公开(公告)日：1999-01-26
申请号：US863297
申请日：1997-05-27
申请人： Masahiro Nawa , Shoichi Nakamoto , Keiichi Yamasaki , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
发明人： Masahiro Nawa , Shoichi Nakamoto , Keiichi Yamasaki , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
IPC分类号： C04B35/119 , C04B35/488
CPC分类号： C04B35/488 , C04B35/119
摘要： A zirconia based ceramic material having improved and well-balanced mechanical strength and toughness consists essentially of 0.5 to 50 vol % of Al.sub.2 O.sub.3 having an average grain size of 2 .mu.m or less and the balance of a partially stabilized zirconia having an average grain size of 5 .mu.m or less. The partially stabilized zirconia consists essentially of 8 to 12 mol % of CeO.sub.2, 0.05 to 4 mol % of TiO.sub.2 and the balance of ZrO.sub.2. Fine Al.sub.2 O.sub.3 grains having an average grain size of 1 .mu.m or less are dispersed within the grains of the partially stabilized zirconia at a dispersion ratio. The dispersion ratio is defined as a ratio of the number of Al.sub.2 O.sub.3 grains dispersed within the grains of the partially stabilized zirconia relative to the number of the entire Al.sub.2 O.sub.3 grains dispersed in the ceramic material, and at least 2% in the present invention. The ceramic material can be made by the following process. A first constituent formed of the partially stabilized zirconia is mixed with a second constituent formed of Al.sub.2 O.sub.3 to obtain a mixture. The mixture is molded into a desired shape, and then sintered in the air under an atmospheric pressure to obtain the ceramic material.
摘要翻译：具有改善的良好平衡的机械强度和韧性的氧化锆基陶瓷材料基本上由平均粒径为2μm或更小的0.5至50vol％的Al 2 O 3组成，平均晶粒尺寸为 5亩以下。部分稳定的氧化锆基本上由8〜12mol％的CeO 2，0.05〜4mol％的TiO 2和余量的ZrO 2组成。平均粒径为1μm以下的细Al 2 O 3粒子以分散比分散在部分稳定化的氧化锆的晶粒内。分散比定义为分散在部分稳定的氧化锆的晶粒内的Al 2 O 3颗粒的数量相对于分散在陶瓷材料中的整个Al 2 O 3颗粒的数量的比率，并且在本发明中至少为2％。陶瓷材料可以通过以下方法制成。由部分稳定的氧化锆形成的第一组分与由Al 2 O 3形成的第二组分混合以获得混合物。将混合物成型为所需形状，然后在大气压下在空气中烧结，得到陶瓷材料。

2. 发明授权

US5728636A Zirconia based ceramic material 失效
标题翻译：氧化锆基陶瓷材料
公开(公告)号：US5728636A
公开(公告)日：1998-03-17
申请号：US544285
申请日：1995-10-17
申请人： Masahiro Nawa , Shoichi Nakamoto , Keiichi Yamasaki , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
发明人： Masahiro Nawa , Shoichi Nakamoto , Keiichi Yamasaki , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
IPC分类号： C04B35/49 , C04B35/119 , C04B35/48 , C04B35/488
CPC分类号： C04B35/488 , C04B35/119
摘要： A zirconia based ceramic material having improved and well-balanced mechanical strength and toughness consists essentially of 0.5 to 50 vol % of Al.sub.2 O.sub.3 having an average grain size of 2 .mu.m or less and the balance of a partially stabilized zirconia having an average grain size of 5 .mu.m or less. The partially stabilized zirconia consists essentially of 8 to 12 mol % of CeO.sub.2, 0.05 to 4 mol % of TiO.sub.2 and the balance of ZrO.sub.2. Fine Al.sub.2 O.sub.3 grains having an average grain size of 1 .mu.m or less are dispersed within the grains of the partially stabilized zirconia at a dispersion ratio. The dispersion ratio is defined as a ratio of the number of Al.sub.2 O.sub.3 grains dispersed within the grains of the partially stabilized zirconia relative to the number of the entire Al.sub.2 O.sub.3 grains dispersed in the ceramic material, and at least 2% in the present invention. The ceramic material can be made by the following process. A first constituent formed of the partially stabilized zirconia is mixed with a second constituent formed of Al.sub.2 O.sub.3 to obtain a mixture. The mixture is molded into a desired shape, and then sintered in the air under an atmospheric pressure to obtain the ceramic material.
摘要翻译：具有改善的良好平衡的机械强度和韧性的氧化锆基陶瓷材料基本上由平均粒径为2μm或更小的0.5至50vol％的Al 2 O 3组成，平均晶粒尺寸为 5亩以下。部分稳定的氧化锆基本上由8〜12mol％的CeO 2，0.05〜4mol％的TiO 2和余量的ZrO 2组成。平均粒径为1μm以下的细Al 2 O 3粒子以分散比分散在部分稳定化的氧化锆的晶粒内。分散比定义为分散在部分稳定的氧化锆的晶粒内的Al 2 O 3颗粒的数量相对于分散在陶瓷材料中的整个Al 2 O 3颗粒的数量的比率，并且在本发明中至少为2％。陶瓷材料可以通过以下方法制成。由部分稳定的氧化锆形成的第一组分与由Al 2 O 3形成的第二组分混合以获得混合物。将混合物成型为所需形状，然后在大气压下在空气中烧结，得到陶瓷材料。

3. 发明授权

US5389590A Method of fabricating a sintered ceramic composite 失效
标题翻译：制造烧结陶瓷复合材料的方法
公开(公告)号：US5389590A
公开(公告)日：1995-02-14
申请号：US192727
申请日：1994-02-07
申请人： Masahiro Nawa , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
发明人： Masahiro Nawa , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
IPC分类号： C04B35/76 , C22C29/12 , C04B35/65
CPC分类号： C04B35/76 , C22C29/12
摘要： A sintered ceramic-metal composite product has a ceramic matrix of polycrystalline ceramic in which a metal phase is dispersed for adding improved toughness. The metal phase has a higher melting point than the sintering temperature of the ceramic matrix and comprises at least one metal selected from the groups IVa, Va and VIa of the periodic table. The metal phase is dispersed intragranular within the grains of the ceramic matrix to realize nano-order dispersion of the metal phase which is responsible for remarkably improved toughness as well as strength. The ceramic-metal composite product is successfully fabricated by several unique methods utilizing the mixture of the ceramic and metal or metal oxide, hydride or alkoxide.
摘要翻译：烧结的陶瓷 - 金属复合材料具有多晶陶瓷的陶瓷基体，其中分散有金属相以增加韧性。金属相具有比陶瓷基体的烧结温度更高的熔点，并且包含选自周期表的IVa，Va和VIa族中的至少一种金属。金属相粒内分散在陶瓷基体的晶粒内，实现了金属相的纳米级分散，这导致了显着提高的韧性和强度。通过使用陶瓷和金属或金属氧化物，氢化物或醇盐的混合物的几种独特的方法成功地制造了陶瓷 - 金属复合产品。

4. 发明授权

US5854158A ZrO.sub.2 based ceramic material and method of producing the same 失效
标题翻译： ZrO2系陶瓷材料及其制造方法
公开(公告)号：US5854158A
公开(公告)日：1998-12-29
申请号：US873244
申请日：1997-06-11
申请人： Masahiro Nawa , Shoichi Nakamoto , Koichi Niihara , Tohru Sekino
发明人： Masahiro Nawa , Shoichi Nakamoto , Koichi Niihara , Tohru Sekino
IPC分类号： C04B35/48 , C04B35/488 , C04B35/482 , C04B35/49
CPC分类号： C04B35/4885
摘要： A ZrO.sub.2 based ceramic material having excellent mechanical strength and fracture toughness comprises a first phase of ZrO.sub.2 grains containing CeO.sub.2 as a stabilizer and having an average grain size of 5 .mu.m or less, a second phase of Al.sub.2 O.sub.3 grains having an average grain size of 2 .mu.m or less, and a third phase of elongated crystals of a complex oxide of Al, Ce, and one of Mg and Ca. At least 90 vol % of the first phase is composed of tetragonal ZrO.sub.2. An aluminum (Al) content in the ceramic material is determined such that when Al of the complex oxide is converted to Al.sub.2 O.sub.3, a total amount of Al.sub.2 O.sub.3 in the ceramic material is within a range of 0.5 to 50 vol %. A content of the third phase in the ceramic material is determined within a range of 0.5 to 5 by area %. It is preferred that fine Al.sub.2 O.sub.3 grains having an average grain size of 1 .mu.m or less of the second phase are dispersed within the ZrO.sub.2 grains at a dispersion ratio of at least 2%.
摘要翻译：具有优异的机械强度和断裂韧性的ZrO 2系陶瓷材料包括含有CeO 2作为稳定剂并具有5μm以下的平均粒径的ZrO 2粒子的第一相，平均粒径为2μm的Al 2 O 3粒子的第二相以及Al，Ce和Mg和Ca之一的复合氧化物的细长晶体的第三相。第一相的至少90体积％由四方晶ZrO 2组成。确定陶瓷材料中的铝（Al）含量，使得当复合氧化物的Al转化为Al 2 O 3时，陶瓷材料中Al 2 O 3的总量在0.5至50体积％的范围内。陶瓷材料中的第三相的含量在0.5〜5的面积％的范围内决定。优选第二相的平均粒径为1μm以下的细小的Al 2 O 3粒子以至少2％的分散比分散在ZrO 2粒子内。

5. 发明授权

US5525560A Zirconia based composite material and method of manufacturing the same product 失效
标题翻译：氧化锆基复合材料及其制造方法
公开(公告)号：US5525560A
公开(公告)日：1996-06-11
申请号：US444924
申请日：1995-05-19
申请人： Keiichi Yamazaki , Masahiro Nawa , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
发明人： Keiichi Yamazaki , Masahiro Nawa , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
IPC分类号： C04B35/48 , C04B35/488 , C04B35/76 , C22C29/12
CPC分类号： C22C29/12 , C04B35/488 , C04B35/76
摘要： A zirconia based composite material with improved strength and toughness includes a partially stabilized zirconia including 1.5 to 4.5 mol % of yttrium oxide as a matrix thereof and a metal phase of at least one metal selected from the group consisting of titanium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten as metal grains dispersed in the matrix. The metal phase has a melting point higher than a sintering temperature of the partially stabilized zirconia. In addition, it is preferred that the composite material further contains a ceramic phase of at least one ceramic selected from the group consisting of Al.sub.2 O.sub.3, SiC, Si.sub.3 N.sub.4, B.sub.4 C, carbides, nitrides and borides of titanium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten as ceramic grains dispersed in the matrix. The composite material of the present invention is manufactured by the following steps. A mixture is prepared by incorporating at least one first constituent forming the partially stabilized zirconia with at least one second constituent forming the metal phase, and if necessary, at least one third constituent forming the ceramic phase. The mixture is sintered in a non-oxidation atmosphere to obtain the composite material.
摘要翻译：具有改进的强度和韧性的氧化锆基复合材料包括部分稳定的氧化锆，其包含1.5至4.5mol％的氧化钇作为其基体，以及选自钛，钒，铌，钽的至少一种金属的金属相，铬，钼和钨作为分散在基质中的金属颗粒。金属相的熔点高于部分稳定的氧化锆的烧结温度。此外，优选复合材料还含有选自Al2O3，SiC，Si3N4，B4C，钛，钒，铌，钽，铬的碳化物，氮化物和硼化物中的至少一种陶瓷的陶瓷相，钼和钨作为分散在基质中的陶瓷颗粒。本发明的复合材料通过以下步骤制造。通过将形成部分稳定的氧化锆的至少一种第一组分与形成金属相的至少一种第二组分并且如果需要，至少形成陶瓷相的第三组分合并来制备混合物。将混合物在非氧化气氛中烧结，得到复合材料。

6. 发明授权

US5296301A Sintered ceramic-metal composite product and method of fabricating the same 失效
标题翻译：烧结陶瓷 - 金属复合材料及其制造方法
公开(公告)号：US5296301A
公开(公告)日：1994-03-22
申请号：US769398
申请日：1991-10-01
申请人： Masahiro Nawa , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
发明人： Masahiro Nawa , Koichi Niihara , Atsushi Nakahira , Tohru Sekino
IPC分类号： C04B35/76 , C22C29/12 , C04B35/00
CPC分类号： C04B35/76 , C22C29/12
摘要： A sintered ceramic-metal composite product has a ceramic matrix of polycrystalline ceramic in which a metal phase is dispersed for adding improved toughness. The metal phase has a higher melting point than the sintering temperature of the ceramic matrix and comprises at least one metal selected from the groups IVa, Va and VIa of the periodic table. The metal phase is dispersed intragranular within the grains of the ceramic matrix to realize nano-order dispersion of the metal phase which is responsible for remarkably improved toughness as well as strength. The ceramic-metal composite product is successfully fabricated by several unique methods utilizing the mixture of the ceramic and metal or metal oxide, hydride or alkoxide.
摘要翻译：烧结的陶瓷 - 金属复合材料具有多晶陶瓷的陶瓷基体，其中分散有金属相以增加韧性。金属相具有比陶瓷基体的烧结温度更高的熔点，并且包含选自周期表的IVa，Va和VIa族中的至少一种金属。金属相粒内分散在陶瓷基体的晶粒内，实现了金属相的纳米级分散，这导致了显着提高的韧性和强度。通过使用陶瓷和金属或金属氧化物，氢化物或醇盐的混合物的几种独特的方法成功地制造了陶瓷 - 金属复合产品。

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