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    Process for producing silicon carbide heating elements
    3.
    发明授权
    Process for producing silicon carbide heating elements 失效
    生产碳化硅加热元件的方法

    公开(公告)号：US4668452A

    公开(公告)日：1987-05-26

    申请号：US707257

    申请日：1985-03-01

    申请人： Masakazu Watanabe ,  Akiyasu Okuno ,  Shunkichi Nozaki ,  Yasushi Matsuo ,  Isamu Fukuura

    发明人： Masakazu Watanabe ,  Akiyasu Okuno ,  Shunkichi Nozaki ,  Yasushi Matsuo ,  Isamu Fukuura

    IPC分类号： C04B35/575 ,  C04B35/56

    CPC分类号： C04B35/5755

    摘要： A process for producing a silicon carbide heating element is disclosed comprising: adding boron or a boron compound in an amount corresponding to from 0.3 to 3.0% by weight as boron, and carbon or a carbon compound in an amount corresponding to from 0.1 to 6.0% by weight as carbon, to a SiC powder having an average particle size of 1.0.mu. or less; blending and molding the mixture; conducting a primary sintering in vacuum or in an inert atmosphere, except nitrogen; and thereafter conducting a secondary sintering at from 1500.degree. to 2300.degree. C. in a pressurized nitrogen atmosphere to produce a silicon carbide heating element having a density of at least 80% based on the theoretical density and an electrical resistivity of 1.0 .OMEGA.-cm or less.

    摘要翻译： 公开了一种制造碳化硅加热元件的方法，其包括：硼或硼化合物的添加量相当于硼原子的0.3〜3.0重量％，碳或碳化合物的添加量相当于0.1〜6.0重量％ 作为碳的平均粒径为1.0μm以下的SiC粉末; 混合和成型混合物; 在真空或惰性气氛中进行初步烧结，除了氮气; 然后在加压氮气气氛中在1500〜2300℃下进行二次烧结，制成基于理论密度，电阻率为1.0欧姆 - 厘米或以上的密度为至少80％的碳化硅加热元件 减。

    Process for the production of silicon nitride sintered bodies
    4.
    发明授权
    Process for the production of silicon nitride sintered bodies 失效
    制造氮化硅烧结体的方法

    公开(公告)号：US4521358A

    公开(公告)日：1985-06-04

    申请号：US521283

    申请日：1983-08-08

    申请人： Kazunori Miura ,  Yoshinori Hattori ,  Yasushi Matsuo

    发明人： Kazunori Miura ,  Yoshinori Hattori ,  Yasushi Matsuo

    IPC分类号： C04B35/591 ,  C04B35/593 ,  F02B3/06 ,  C04B35/58

    CPC分类号： C04B35/593 ,  C04B35/591 ,  F02B3/06

    摘要： Processes for the production of a silicon nitride sintered body are disclosed. One process comprises molding a mixed powder of 100 parts by weight of metallic silicon with a maximum particle size of 20 .mu.m or less and 0.2 to 2 parts by weight (calculated as chromium oxide) of a chromium component and, thereafter, reaction sintering the mold in a nitrogen gas or in a non-oxidizing atmosphere containing nitrogen gas at a temperature of 1,300.degree. to 1,500.degree. C. This invention provides further process which comprises molding a mixed powder of 100 parts by weight of metallic silicon with a maximum particle size of 20 .mu.m or less, 0.2 to 1 part by weight (calculated as chromium oxide) of a chromium component, and further 10 to 20 parts by weight of an oxide component of one or more of the oxides of yttrium, lanthanum, cerium, gadolinium, and erbium, reaction sintering the above-prepared mold, and thereafter, hot pressing the reaction sintered body. This silicon nitride hot pressed body is superior in oxidation resistance, and moreover is of high density and has high mechanical strength. Thus it is suitable for use as, e.g., gas turbine parts of diesel engine parts.

    摘要翻译： 公开了制造氮化硅烧结体的方法。 一种方法包括：将100重量份最大粒度为20μm或更小的金属硅和0.2至2重量份（以铬氧化物计）的铬组分的混合粉末模塑，然后将 在氮气中或在含有氮气的非氧化性气氛中在1300〜1500℃的温度下成型。本发明提供了进一步的方法，其包括将最大粒径为100重量份的金属硅的混合粉末 20μm以下，0.2〜1重量份（以氧化铬计算）的铬成分，还含有10〜20重量份的氧化物成分，一种或多种钇，镧，铈， 钆和铒，对上述制备的模具进行反应烧结，然后热压该反应烧结体。 该氮化硅热压体的耐氧化性优异，而且密度高，机械强度高。 因此，它适用于例如柴油发动机部件的燃气轮机部件。

    Process for producing silicon nitride sintered products having high toughness
    6.
    发明授权
    Process for producing silicon nitride sintered products having high toughness 失效
    具有高韧性的氮化硅烧结体的制造方法

    公开(公告)号：US4440707A

    公开(公告)日：1984-04-03

    申请号：US428507

    申请日：1982-09-29

    申请人： Toru Shimamori ,  Yoshinori Hattori ,  Yasushi Matsuo

    发明人： Toru Shimamori ,  Yoshinori Hattori ,  Yasushi Matsuo

    IPC分类号： C04B35/591 ,  C04B35/584 ,  C04B35/593 ,  C04B35/38

    CPC分类号： C04B35/593 ,  C04B35/584

    摘要： A process for producing a silicon nitride sintered product having high toughness is described, comprising blending from 97 to 57% by weight of metallic silicon powder having a maximum particle size of 25 .mu.m or less with from 1 to 15% by weight, calculated as TiN, of a TiN powder having a maximum particle size of 20 .mu.m or less or a powder of titanium component capable of changing into TiN during reaction sintering, and from 2 to 28% by weight of one or more components selected from the group consisting of AlN, Al.sub.2 O.sub.3, SiO.sub.2 and oxides of rare earth elements, molding the resulting mixture, carrying out reaction sintering in a nonoxidizing atmosphere of a nitrogen gas or a nitrogen-containing mixed gas, and thereafter resintering in the same atmosphere at a temperature of from 1,600.degree. C. to 2,200.degree. C.

    摘要翻译： 描述了一种制造具有高韧性的氮化硅烧结产品的方法，其包括将97至57重量％的最大粒度为25μm或更小的金属硅粉末与1至15重量％混合，计算为 TiN，其具有最大粒度为20μm以下的TiN粉末或能够在反应烧结时变为TiN的钛成分的粉末，以及2〜28重量％的选自以下的组分中的一种或多种： 的AlN，Al2O3，SiO2和稀土元素的氧化物，将所得混合物成型，在氮气或含氮混合气体的非氧化气氛中进行反应烧结，然后在相同的气氛中在 1600〜2200℃

    High strength silicon nitride sintered material
    7.
    发明授权
    High strength silicon nitride sintered material 失效
    高强度氮化硅烧结材料

    公开(公告)号：US4216021A

    公开(公告)日：1980-08-05

    申请号：US035970

    申请日：1979-05-04

    申请人： Yoshinori Hattori ,  Yasushi Matsuo

    发明人： Yoshinori Hattori ,  Yasushi Matsuo

    IPC分类号： C22C29/16 ,  C04B35/584 ,  C04B35/597 ,  C04B35/58

    CPC分类号： C04B35/597 ,  C04B35/584

    摘要： A high strength silicon nitride sintered material having a modulus of rupture of about 100 kg/mm.sup.2 or more, which is prepared by sintering a mixture of about 88.7 to 98% by weight of silicon nitride (Si.sub.3 N.sub.4) and the balance a sintering aid comprising Al.sub.2 O.sub.3, Y.sub.2 O.sub.3 and Ti present in the following proportions based on weight: ##EQU1##

    摘要翻译： 通过烧结约88.7-98重量％的氮化硅（Si 3 N 4）的混合物制备的具有约100kg / mm 2或更高的断裂模量的高强度氮化硅烧结材料，其余为包含Al 2 O 3的烧结助剂 ，Y 2 O 3和Ti以以下重量比例存在：

    Sintered silicon nitride products and processes for fabrication thereof
    8.
    发明授权
    Sintered silicon nitride products and processes for fabrication thereof 失效
    烧结氮化硅产品及其制造方法

    公开(公告)号：US4511402A

    公开(公告)日：1985-04-16

    申请号：US640541

    申请日：1984-08-14

    申请人： Kazunori Miura ,  Yoshinori Hattori ,  Yasushi Matsuo

    发明人： Kazunori Miura ,  Yoshinori Hattori ,  Yasushi Matsuo

    IPC分类号： C04B35/584 ,  C04B35/591 ,  C04B35/593 ,  C22C29/00

    CPC分类号： C04B35/584 ,  C04B35/593

    摘要： A sintered silicon nitride products and processes for the fabrication thereof are described, wherein the product comprises from 60 to 98.9% by weight of silicon nitride, from 0.1 to 15% by weight of one or more chromium components selected from metal chromium, chromium oxide, and chromium nitride, and from 1 to 25% by weight of one or more oxides selected from oxides of rare earth elements, scandium oxide, yttrium oxide, aluminum oxide, zirconium oxide and silicon dioxide.

    摘要翻译： 描述了一种烧结氮化硅产品及其制造方法，其中该产品包含60至98.9重量％的氮化硅，0.1至15重量％的一种或多种选自金属铬，氧化铬， 和氮化铬，以及1至25重量％的选自稀土元素氧化物，氧化钪，氧化钇，氧化铝，氧化锆和二氧化硅的一种或多种氧化物。

    High toughness sintered bodies
    10.
    发明授权
    High toughness sintered bodies 失效
    高韧性烧结体

    公开(公告)号：US4626517A

    公开(公告)日：1986-12-02

    申请号：US701646

    申请日：1985-02-14

    申请人： Masakazu Watanabe ,  Satoshi Iio ,  Yasushi Matsuo

    发明人： Masakazu Watanabe ,  Satoshi Iio ,  Yasushi Matsuo

    IPC分类号： C04B35/119 ,  C04B35/486 ,  C04B35/488 ,  C04B35/58 ,  C04B35/48

    CPC分类号： C04B35/58014 ,  C04B35/119 ,  C04B35/486 ,  C04B35/488 ,  C04B35/4885 ,  C04B2235/666

    摘要： A high toughness sintered body is described, consisting essentially of from 40 to 99.5% by weight of Component A, and 0.5 to 60% by weight of Component B, wherein the mean grain size of the sintered body is 3 microns or less, and Components A and B are as follows:Component A: ZrO.sub.2 containing a stabilizer, such as Y.sub.2 O.sub.3, CaO, and MgO, in which the fraction of the tetragonal and cubic ZrO.sub.2 constitutes at least 90% by weight, and the ratio of the tetragonal ZrO.sub.2 to the cubic ZrO.sub.2 is at least 1/3; andComponent B: at least one of Al.sub.2 O.sub.3 and TiN, with impurities being 3% by weight or less of SiO.sub.2, 0.5% by weight or less of Fe.sub.2 O.sub.3, and 0.5% by weight or less of TiO.sub.2, provided that the total amount is 3% by weight or less.

    摘要翻译： 描述了高韧性烧结体，其基本上由组分A的40至99.5重量％和组分B的0.5至60重量％组成，其中烧结体的平均晶粒尺寸为3微米或更小，并且组分 A和B如下：组分A：含有稳定剂如ZrO 2，CaO和MgO的ZrO 2，其中四方晶和立方ZrO 2的分数占至少90重量％，四方晶ZrO 2与 立方ZrO 2至少为1/3; 和组分B：Al 2 O 3和TiN中的至少一种，杂质为3重量％以下的SiO 2，0.5重量％以下的Fe 2 O 3和0.5重量％以下的TiO 2，前提条件是总量为3 重量％以下。