Sintered product of silicon nitride
    1.
    发明授权
    Sintered product of silicon nitride 失效
    氮化硅烧结制品

    公开(公告)号:US5804523A

    公开(公告)日:1998-09-08

    申请号:US853410

    申请日:1997-05-09

    IPC分类号: C04B35/593 C04B35/587

    CPC分类号: C04B35/593 C04B35/5935

    摘要: A sintered product of silicon nitride containing not smaller than 70 mol % of a .beta.-silicon nitride as well as an element of the Group 3a at least including Lu of periodic table and impurity oxygen, wherein when the content of the element of the Group 3a of periodic table and the content of the impurity oxygen are, respectively, expressed being reckoned as the amount of an oxide of the element of the Group 3a of periodic table (RE.sub.2 O.sub.3) and as the amount of SiO.sub.2 of impurity oxygen, their total amount is from 2 to 30 mol %, the molar ratio (SiO.sub.2 /RE.sub.2 O.sub.3) of the amount of the element of the Group 3a of periodic table reckoned as the oxide (RE.sub.2 O.sub.3) thereof to the amount of impurity oxygen reckoned as SiO.sub.2 is from 1.6 to 10, and the intergranular phase of the sintered product chiefly comprises a crystal phase consisting of the element of the Group 3a of periodic table, silicon and oxygen and a process for producing the same. The sintered product has a large strength from room temperature through up to high temperatures and maintains excellent resistance against oxidation even at high temperatures, and exhibits excellent resistance against creeping and excellent breaking toughness.

    摘要翻译: 包含不小于70mol%的β-氮化硅的氮化硅的烧结产品以及至少包括Lu的元素周期表和杂质氧的第3a族的元素,其中当第3a族元素的含量 的周期表和杂质氧的含量分别表示为元素周期表(RE 2 O 3)的第3a族元素的氧化物的量和杂质氧的SiO 2的量,它们的总量是 2〜30摩尔%时,作为氧化物(RE 2 O 3)的元素周期表中的元素的量与作为SiO 2计算的杂质氧的量的摩尔比(SiO 2 / RE 2 O 3)为1.6〜10 ,并且烧结体的晶间相主要包含由元素周期表第3a族元素,硅和氧组成的结晶相及其制造方法。 该烧结体从室温至高温具有很大的强度,即使在高温下也能保持优异的抗氧化性,并且具有优异的抗蠕变性和优异的断裂韧性。

    BORON CARBIDE SINTERED BODY AND PROTECTIVE MEMBER
    3.
    发明申请
    BORON CARBIDE SINTERED BODY AND PROTECTIVE MEMBER 有权
    硼碳化物烧结体和保护构件

    公开(公告)号:US20070203012A1

    公开(公告)日:2007-08-30

    申请号:US11679224

    申请日:2007-02-27

    摘要: The compressive strength of a boron carbide sintered compact is improved by controlling crystals of the boron carbide to a polycrystalline structure having a grain size distribution in which coarse crystals with a grain size of 20 μm or more and fine crystals with a grain size of 10 μm or less are mixed in an appropriate ratio. Furthermore, a protective member having an improved compressive strength can be provided using the boron carbide sintered compact having a polycrystalline structure in which coarse crystals and fine crystals are mixed in an appropriate ratio or a boron carbide sintered compact containing graphite and silicon carbide.

    摘要翻译: 碳化硼烧结体的抗压强度通过将碳化硼的晶体控制为晶粒尺寸分布的多晶结构而改善,其中粒径为20μm以上的粗晶体和粒径为10μm的微细晶体 或更少的混合物。 此外,可以使用具有多晶结构的碳化硼烧结体来提供具有改善的抗压强度的保护构件,其中粗结晶和细晶体以适当的比例混合,或者含有石墨和碳化硅的碳化硼烧结体。

    Boron carbide sintered body and protective member
    6.
    发明授权
    Boron carbide sintered body and protective member 有权
    碳化硼烧结体和保护部件

    公开(公告)号:US07557054B2

    公开(公告)日:2009-07-07

    申请号:US11679224

    申请日:2007-02-27

    摘要: The compressive strength of a boron carbide sintered compact is improved by controlling crystals of the boron carbide to a polycrystalline structure having a grain size distribution in which coarse crystals with a grain size of 20 μm or more and fine crystals with a grain size of 10 μm or less are mixed in an appropriate ratio. Furthermore, a protective member having an improved compressive strength can be provided using the boron carbide sintered compact having a polycrystalline structure in which coarse crystals and fine crystals are mixed in an appropriate ratio or a boron carbide sintered compact containing graphite and silicon carbide.

    摘要翻译: 碳化硼烧结体的抗压强度通过将碳化硼的晶体控制为晶粒尺寸分布的多晶结构而改善,其中粒径为20μm以上的粗晶体和粒径为10μm的微细晶体 或更少的混合物。 此外,可以使用具有多晶结构的碳化硼烧结体来提供具有改善的抗压强度的保护构件,其中粗结晶和细晶体以适当的比例混合,或者含有石墨和碳化硅的碳化硼烧结体。