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    • 4. 发明授权
    • Rapidly solidified zirconium modified nickel aluminide of improved
strength
    • 快速固化的锆改性镍铝化合物具有改善的强度
    • US4743316A
    • 1988-05-10
    • US783724
    • 1985-10-03
    • Alan I. TaubKeh-Minn ChangShyh-Chin Huang
    • Alan I. TaubKeh-Minn ChangShyh-Chin Huang
    • C22C19/00
    • C22C19/007
    • It had been found previously that tri-nickel aluminide compositions are quite sensitive to the ratio of nickel to aluminum in their ability to receive boron as a dopant. It has now been found that compositions which are relatively poor in the aluminum component can be doped more effectively with a combination of boron and zirconium. It has been found for the nickel aluminides which have lower concentrations of aluminum that the percent of zirconium and boron which can be added to the composition to effectively increase the strength of the alloys is favored by the lower aluminum ratio. The compositions which result are found to have significant strength properties not only at room temperature but at elevated temperatures based on tensile tests of the compositions.
    • 以前已经发现,三镍铝化合物对于接受硼作为掺杂剂的能力对镍与铝的比率非常敏感。 现在已经发现,可以通过硼和锆的组合更有效地掺杂铝组分相对较差的组合物。 已经发现,对于具有较低浓度的铝的铝酸镍,可以通过较低的铝比例来增加可以添加到组合物中以有效地增加合金的强度的锆和硼的百分比。 发现所得的组合物不仅在室温下而且在基于组合物的拉伸试验的高温下具有显着的强度特性。
    • 6. 发明授权
    • Tri-nickel aluminide compositions ductile at hot-short temperatures
    • 三镍铝化合物组合物在热短温下延展
    • US4609528A
    • 1986-09-02
    • US783582
    • 1985-10-03
    • Keh-Minn ChangShyh-Chin HuangAlan I. Taub
    • Keh-Minn ChangShyh-Chin HuangAlan I. Taub
    • C22F1/10B22F3/16C22C1/00C22C1/02C22C1/04C22C19/03C22F1/00B22F1/02
    • C22C19/03B22F3/16C22C1/0433
    • A method is taught for rendering a boron-doped tri-nickel aluminide resistant to mechanical failure while at intermediate temperatures of 600.degree. C. to 800.degree. C. due to a hot-short phenomena. The method involves incorporating between 0.05 and 0.30 of cobalt in the composition according to the expression(Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y.The concentration of aluminum, z, is between 0.23 and 0.25 and the concentration of boron, y, is between 0.2 and 1.50 atomic percent. The composition is formed into a melt and the melt is rapidly solidified by atomization and consolidated. The consolidation may be simultaneous with the rapid solidification, as in spray forming, or sequential by atomization to a powder and consolidation of the powder by HIPping. The consolidated body is cold worked to increase the resistance of the body to failure at intermediate temperatures and may be annealed following the cold working.
    • 教导了一种方法,用于在600℃至800℃的中等温度下,由于热缺陷现象而使耐受机械故障的硼掺杂三镍铝化物。 该方法包括根据表达式(Ni1-x-zCoxAlz)100-yBy在组合物中加入0.05至0.30的钴。 铝的浓度z在0.23〜0.25之间,硼的浓度y在0.2〜1.50原子%之间。 将组合物形成熔体并通过雾化快速固化熔融并固化。 固化可以与快速凝固同时进行,如在喷雾形成中,或者通过雾化到粉末并通过HIPping固结粉末。 固结体被冷加工以增加身体在中间温度下的失效的阻力,并且可以在冷加工之后进行退火。
    • 8. 发明授权
    • Cold worked tri-nickel aluminide alloy compositions
    • 冷加工三镍铝合金组合物
    • US4676829A
    • 1987-06-30
    • US783723
    • 1985-10-03
    • Keh-Minn ChangAlan I. TaubShyh-Chin Huang
    • Keh-Minn ChangAlan I. TaubShyh-Chin Huang
    • C22C1/04C22C19/00C22C19/03C22C29/14
    • C22C19/007
    • Improvements in the positive temperature dependence of yield strength and in the work hardening rate of tri-nickel aluminide base alloys are achieved. The novel alloy composition has seven alloying ingredients as follows:______________________________________ ConcentrationIngredient in Atomic %______________________________________Ni balanceCo 8-12Al 16-20Si 4-6Nb 0.26-0.30Zr 0.02-0.04B 0.2-0.7______________________________________The novel composition may be prepared by forming a melt of the composition and atomizing the melt with an inert gas to form fine particles with Ll.sub.2 type crystal structure. The powder is densified by heat and pressure to a novel alloy composition having the improvements in positive temperature dependence of yield strength and work hardening rate as noted above.
    • 实现了三镍铝基合金的屈服强度和加工硬化率的正温度依赖性的改善。 新型合金成分具有以下七种合金成分: - 浓度 - 原子%-Ni平衡-Co 8-12 -Al 16-20 -Si 4-6 - Nb 0.26-0.30 -Zr 0.02-0.04 -B 0.2- 0.7 - 可以通过形成组合物的熔体并用惰性气体雾化熔体以形成具有Ll2型晶体结构的细颗粒来制备新组合物。 通过热和压力将粉末致密化成如上所述具有改善屈服强度和加工硬化率的正温度依赖性的新型合金组合物。