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    INTEGRAL TITANIUM BORIDE COATINGS ON TITANIUM SURFACES AND ASSOCIATED METHODS
    182.
    发明公开
    INTEGRAL TITANIUM BORIDE COATINGS ON TITANIUM SURFACES AND ASSOCIATED METHODS 审中-公开
    钛表面上的整体钛硼化物涂层及相关方法

    公开(公告)号：EP1587676A2

    公开(公告)日：2005-10-26

    申请号：EP03786807.2

    申请日：2003-11-17

    Applicant: University of Utah Research Foundation

    Inventor： CHANDRAN, Ravi, K.S. ,  AICH, Shampa

    IPC: B32B15/02 ,  C01B35/04

    CPC classification number: C01B35/04 ,  B22F2998/00 ,  C04B35/62272 ,  C04B2235/3826 ,  C04B2235/3873 ,  C04B2235/404 ,  C04B2235/421 ,  C04B2235/526 ,  C04B2235/5264 ,  C22C32/0073 ,  C22C49/11 ,  C23C8/68 ,  B22F2201/00

    Abstract: A borided titanium article can include a titanium mass having titanium monoboride whiskers infiltrating inward from a surface of the titanium mass to form an integral surface hardened region. The titanium mass can be almost any titanium based metal or alloy such as high purity titanium, commercial grade titanium, a-titanium alloy, α+β titanium alloy, β-titanium alloy, titanium composite, and combinations thereof. Borided titanium articles can be formed by methods which include providing a titanium mass, contacting a surface of the titanium mass with a boron source medium, and heating the titanium mass and boron source medium to a temperature from about 700 °C to about 1600 °C. The boron source medium can include a boron source and an activator selected to provide growth of titanium monoboride whiskers. The boron source medium can be provided as a solid particulate mixture, liquid mixture, or as a gaseous mixture. During heating, boron from the boron source infiltrates into the titanium mass and forms titanium monoboride whiskers which improve the surface hardness, wear resistance, oxidation resistance, and corrosion resistance of the treated surface. The titanium monoboride whiskers can be controlled to have the desired dimensions, depending on the application requirements. Boriding titanium surfaces using these methods, provides a relatively inexpensive and effective process for improving the surface properties of titanium which are then useful in a wide variety of applications.

    Abstract translation: 硼化钛制品可以包括具有从钛块表面向内渗透的钛一硼化物晶须以形成整体表面硬化区域的钛块。 钛质可以是几乎任何钛基金属或合金，例如高纯钛，商业级钛，α-钛合金，α+β钛合金，β-钛合金，钛复合物及其组合。 硼化钛制品可以通过以下方法形成，所述方法包括提供钛块，使钛块的表面与硼源介质接触，以及将钛块和硼源介质加热至约700℃至约1600℃的温度 。 硼源介质可以包括硼源和选择用于提供钛一硼化物晶须生长的活化剂。 硼源介质可以作为固体颗粒混合物，液体混合物或作为气体混合物提供。 在加热期间，来自硼源的硼渗入到钛块中并形成钛硼酸盐晶须，其改善了处理过的表面的表面硬度，耐磨性，抗氧化性和耐腐蚀性。 根据应用要求，可以控制钛一硼化物晶须以具有所需的尺寸。 使用这些方法使钛表面硼化，为改善钛的表面性能提供了一种相对便宜和有效的方法，其随后用于各种各样的应用。

    PROCESS FOR THE PRODUCTION OF POWDERED NICKEL
    183.
    发明公开
    PROCESS FOR THE PRODUCTION OF POWDERED NICKEL 有权
    用于生产镍粉

    公开(公告)号：EP0978338A4

    公开(公告)日：2004-11-24

    申请号：EP99902917

    申请日：1999-02-16

    Applicant: TOHO TITANIUM CO LTD

    Inventor： KAGOHASHI WATARU ,  ASAI TSUYOSHI ,  TAKATORI HIDEO

    IPC: B22F9/28

    CPC classification number: B22F9/28 ,  B22F2998/00 ,  B22F2999/00 ,  B22F1/0018 ,  B22F2201/013 ,  B22F2201/00

    Abstract: Chlorine gas from a supply nozzle is mixed with the vapor of nickel chloride and the mixed gas is supplied from a supply nozzle into a hydrogen gas atmosphere in a reduction reactor at a reduction temperature of 900 to 1100 DEG C. The volume of chlorine gas to be mixed versus the vapor of nickel chloride is adjusted to a ratio of 0.01 to 0.5 moles per mole of the vapor of nickel chloride. The particle size of the nickel powder can be controlled appropriately, and also, uniformity of particle size, smoothability of surfaces of particles, and sphericity can be improved.

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