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    • 6. 发明公开
    • 탄소나노튜브가 강화된 금속 나노복합분말 및 그 제조방법
    • 通过分散,超声处理,混合,超声处理,干燥和计算和还原过程将碳纳米管的金属纳米粉末均匀分散在金属基体中,并制备方法
    • KR1020050012556A
    • 2005-02-02
    • KR1020030051549
    • 2003-07-25
    • 한국과학기술원
    • 홍순형차승일김경태
    • B22F9/18B82Y30/00
    • B01J19/10B01J6/001B22F1/0059B22F2998/00B22F2998/10B22F2999/00B82Y30/00C01P2002/72C01P2004/03C01P2004/13C09C1/48C09C1/56B22F9/22B22F2201/013B22F2201/04C22C26/00C22C2026/002C01B32/05
    • PURPOSE: To provide a metal nanocomposite powder preparation method capable of solving agglomeration problem of carbon nanotubes by uniformly dispersing carbon nanotubes into a metal matrix, and metal nanocomposite powders comprising the carbon nanotubes uniformly dispersed into the metal matrix, the metal nanocomposite powders prepared by the method. CONSTITUTION: A preparation method of metal nanocomposite powders in which carbon nanotubes are dispersed into a metal matrix comprises a step(a) of dispersing carbon nanotubes into an appropriate dispersion solvent; a step(b) of ultrasonic treating a solution in which carbon nanotubes are dispersed into the dispersion solvent; a step(c) of uniformly mixing a water soluble metal salt or metal hydrate with the dispersed solution of the step(b), wherein the metal is selected from the group consisting of copper, nickel, cobalt, iron and tungsten; a step(d) of ultrasonic treating a mixed dispersed solution of the step(c); a step(e) of drying and calcining a dispersed mixed solution of the step(d), wherein the drying process is performed at a temperature of 80 to 100 deg.C, the calcination process is performed at a temperature of about 200 to 350 deg.C at an air atmosphere if the metal matrix is required to be calcined at a temperature of 400 deg.C or less, the calcination process is performed at a temperature of about 400 to 1,700 deg.C under the low vacuum state if the metal matrix is required to be calcined at a temperature of 400 deg.C or more, and a drying process is additionally performed in a temperature range of 300 to 350 deg.C if the metal matrix is required to be calcined at a temperature of 400 deg.C or more; and a step(f) of reducing metal oxide nanocomposite powders prepared in the step(e) at an atmosphere of a reduction gas that is hydrogen gas, CO gas, or CO2 gas.
    • 目的:提供一种能够通过将碳纳米管均匀分散在金属基体中来解决碳纳米管的附聚问题的金属纳米复合粉末制备方法,以及包含均匀分散在金属基质中的碳纳米管的金属纳米复合粉末,由 方法。 构成:其中碳纳米管分散在金属基体中的金属纳米复合粉末的制备方法包括将碳纳米管分散到合适的分散溶剂中的步骤(a) 将碳纳米管分散在分散溶剂中的溶液进行超声波处理的工序(b) 将水溶性金属盐或金属水合物与步骤(b)的分散溶液均匀混合的步骤(c),其中所述金属选自铜,镍,钴,铁和钨; 步骤(d)超声波处理步骤(c)的混合分散溶液; 干燥和煅烧步骤(d)的分散混合溶液的步骤(e),其中干燥过程在80至100℃的温度下进行,煅烧过程在约200至350℃的温度下进行 如果金属基体需要在400℃或更低的温度下煅烧,则在低真空状态下在约400至1700℃的温度下进行煅烧,如果 金属基体需要在400℃以上的温度下煅烧,如果需要在400℃的温度下煅烧金属基体,则在300〜350℃的温度范围内进一步进行干燥处理 deg.C以上; 以及在氢气,CO气体或CO 2气体的还原气体的气氛下还原步骤(e)中制备的金属氧化物纳米复合粉末的工序(f)。
    • 7. 发明公开
    • 밀링 절삭 공구용Ti(C,N)-(Ti,Nb,W)(C,N)-Co 합금
    • 含有Nb,W,C,N和Co的烧结钛基碳氮化物合金用于铣削操作及其制造方法
    • KR1020040044153A
    • 2004-05-27
    • KR1020030081367
    • 2003-11-18
    • 산드빅 인터렉츄얼 프로퍼티 에이비
    • 베인예롤드롤란데르울프빈셸스마르코
    • C22C29/04
    • B22F3/1007B22F2005/001B22F2998/00B22F2999/00C22C1/051C22C29/04B22F2207/07B22F2201/02B22F2201/04B22F1/0003
    • PURPOSE: To provide a cermet material with substantially improved wear resistance while maintaining toughness and resistance to plastic deformation on the same level as state-of-the-art cermets. CONSTITUTION: In a titanium based carbo nitride alloy for milling operation whose fine structure comprises hard constituents with undissolved Ti(C,N) cores (A) and contains Ti, Nb, W, C, N and Co, the alloy further comprises 9 to 14 at.% of Co, 1 to less than 3 at.% of Nb, 3 to 8 at.% of W, C and N having a C/(N+C) ratio of 0.50 to 0.75, and Ni and Fe as impurities except Ti, wherein the amount of undissolved Ti(C,N) cores is 26 to 37 vol.% of the hard constituents and the balance being one or more complex carbo nitride phases (B), wherein the alloy contains 10 to 13 at.% of Co, wherein the alloy contains 1.5 to 2.5 at.% of Nb, wherein the alloy contains 3 to 4 at.% of W, and wherein the amount of undissolved Ti(C,N) cores is 27 to 35 vol.% of the hard constituents, the balance being one or more complex carbo nitride phases.
    • 目的:提供具有显着改善的耐磨性的金属陶瓷材料,同时在与最先进的金属陶瓷相同的水平上保持韧性和抗塑性变形。 构成:在用于研磨操作的钛基碳化氮合金中,其精细结构包括具有未溶解的Ti(C,N)芯(A)的硬质组分并且包含Ti,Nb,W,C,N和Co,该合金还包含9〜 Co为14原子%,Nb为1〜3原子%,W / C为3〜8原子%,C /(N + C)比为0.50〜0.75的N,Ni为Fe 不溶于Ti的杂质,其中未溶解的Ti(C,N)核的量为硬组分的26至37体积%,余量为一个或多个复合碳氮化物相(B),其中该合金含有10至13个 %的Co,其中合金含有1.5〜2.5原子%的Nb,其中合金含有3〜4原子%的W,其中未溶解的Ti(C,N)核的量为27〜35体积%。 %的硬组分,余量是一个或多个复杂的碳氮化物相。