摘要:
The present invention provides a corrosion resistant aluminum-based alloy consisting of a compound which has a composition represented by the general formula:Al.sub.a M.sub.b Mo.sub.c Hf.sub.d Cr.sub.ewherein:M is at least one metal element selected from Ni, Fe and Co and a, b, c, d and e are atomic percentages falling within the following ranges: 50%.ltoreq.a.ltoreq.88%, 2%.ltoreq.b.ltoreq.25%, 2%.ltoreq.c.ltoreq.15%, 4%.ltoreq.d.ltoreq.20% and 4%.ltoreq.e.ltoreq.20%,the compound being at least 50% by volume composed of an amorphous phase. The aluminum-based alloys not only have a high degree of hardness, strength and heat resistance but also exhibit a significantly improved corrosion resistance.
摘要:
A hard thin film having fine crystalline ceramic particles dispersed in a metallic matrix phase is disclosed. The production of the film is effected by first depositing a substantially amorphous film on a substrate and then heat-treating the deposited film. Deposition of the film on the substrate is carried out by using a source of evaporation having a composition represented by the general formula: Al.sub.a M.sub.b, wherein M stands for at least one element selected from the group consisting of Ti, Ta, V, Cr, Zr, Nb, Mo, Hf, W, Mn, Fe, Co, Ni, and Cu and "a" and "b" respectively stand for atomic % in the ranges of 60.ltoreq.a.ltoreq.98.5 and 1.5.ltoreq.b.ltoreq.40, providing a+b=100. Deposition is effected by a physical vapor deposition process in an atmosphere of an inert gas containing a reaction gas while controlling the feed rate of the reaction gas into a chamber in such a manner that the partial pressure of the react/on gas is kept constant or varied continuously or stepwise. By this method, there can be obtained a hard composite film having fine ceramic particles dispersed in a metallic matrix phase or a dense, hard, and composite film having a composition and structure obliquely varied from a substantially crystalline metallic phase to a crystalline ceramic phase in the direction of thickness of the film.
摘要翻译:公开了一种具有分散在金属基体相中的细晶体陶瓷颗粒的硬质薄膜。 通过首先在基板上沉积基本上非晶的膜然后对沉积的膜进行热处理来实现膜的制备。 通过使用具有由通式AlaMb表示的组成的蒸发源进行膜的沉积,其中M表示选自Ti,Ta,V,Cr,Zr中的至少一种元素 ,Nb,Mo,Hf,W,Mn,Fe,Co,Ni和Cu,“a”和“b”分别表示60≤a≤98.5的范围内的原子% b = 40,提供+ b = 100。 通过在包含反应气体的惰性气体的气氛中的物理气相沉积工艺进行沉积,同时将反应气体的进料速率控制在室内,使得反应/导入气体的分压保持恒定,或 连续或逐步变化。 通过该方法,可以获得具有分散在金属基体相中的细微陶瓷颗粒的硬质复合膜或致密的,硬的和复合的膜,其具有从基本上结晶的金属相到结晶陶瓷相倾斜变化的组成和结构 膜的厚度方向。
摘要:
A high-strength aluminum-based alloy consisting of a composition represented by the general formula: Al.sub.bal Q.sub.a M.sub.b X.sub.c, wherein Q is at least one element selected from the group consisting of Mn and Cr; M is at least one element selected from the group consisting of Co, Ni, and Cu; X is at least one of rare earth elements including Y, or Misch metal (Mm); and a, b and c are, in atomic percentages, 1.ltoreq.a.ltoreq.7, 0.5.ltoreq.b.ltoreq.5, and 0
摘要:
A process for producing an amorphous alloy material characterized by imparting ductility to an amorphous alloy having a supercooled liquid region by giving a prescribed amount of strain at a prescribed strain rate to the alloy in the glass transition temperature region of the alloy. The amorphous alloy may be in the form of spherical or irregular-shaped powders or thin ribbons or in the form of primary consolidated shapes thereof or an amorphous alloy casting. The amount of strain and strain rate are preferably 50% or greater and 2.times.10.sup.-2 /sec or higher, respectively, and the worked amorphous alloy material is preferably allowed to cool in a furnace or spontaneously. Suitable examples of the amorphous alloy to be employed include Al-TM-Ln, Mg-TM-Ln, Zr-TM-Al and Hf-TM-Al alloys, wherein TM is a transition metal element and Ln is a rare earth metal element. The thus obtained amorphous alloy is greatly improved in the prevention of embrittlement in hot working peculiar to the alloy.
摘要:
A high-strength aluminum alloy consisting of an amorphous phase containing quasicrystals constituted of aluminum as the principal element, a first additive element consisting of at least one rare earth element and a second additive element consisting of at least one element other than aluminum and rare earth elements, and a crystalline phase consisting of the principal element and the first additive element and the second additive element contained in a supersaturated solid solution form, the amorphous phase containing quasicrystals being contained in a volume percentage of 60 to 90%. The contents of the additive elements preferably fall within a hatched range in the figure, still preferably within a range covered with dot-dash lines in the figure.
摘要:
A magnetic material consisting essentially of A1 and 10 to 50 at. % of at least one capable of alloying with A1 to form quasicrystals (for example, 5 to 25 at. % of at least one member selected between Cu and Pd and 5 to 35 at. % of Mn) and up to 25 at. % of at least one element having a smaller atomic radius than those of the above elements (for example, B). The magnetic material is produced by adding, to a mixture consisting of A1 and at least one element capable of alloying with A1 to form quasicrystals and including at least one transition metal, at least one element having a smaller atomic radius than those of A1 and the above elements to dissolve the element having a smaller atomic radius in a solid solution form in a quasicrystalline phase. The thus obtained magnetic crystal is useful in various applications, such as magnetic recording heads, and a process for producing the same.
摘要:
The present invention provides a process comprising the steps of forming a cast amorphous alloy from an alloy which exhibits glass transition behavior, heating the amorphous alloy to a temperature between Tg and Tx while subjecting the alloy to drawing to obtain a wire and cooling the wire to (Tg-50 K) or lower. By this process, it is possible to produce an amorphous alloy wire at a low cost and provide an ultrafine wire having high strength and high corrosion resistance as well as flexibility. The amorphous alloy wire can be utilized as a reinforcing wire for a composite material, a variety of reinforcing members, a woven fabric and the like.
摘要:
A process for producing an amorphous alloy forming material having at least 50% by volume of an amorphous phase which comprises a first-stage treatment in which an amorphous alloy is maintained in a temperature range below the glass transition temperature, a second-stage treatment in which the alloy is maintained in a temperature range in the supercooled liquid region for a prescribed period of time, and quenching of the alloy thus treated. The process improves the embrittlement peculiar to amorphous alloys subjected to thermal hysteresis for a long time and provides amorphous alloys having excellent strength, ductility and thermal plastic workability.
摘要:
Disclosed are ferrules for an optical fiber connector provided with an insertion hole for setting an optical fiber in position and methods for the production thereof. The ferrule is formed of an amorphous alloy possessing at least a glass transition region, preferably a glass transition region of not less than 30 K in temperature width. Preferably the ferrule is formed of an amorphous alloy having a composition represented by the following general formula and containing an amorphous phase in a volumetric ratio of at least 50%:X.sub.a M.sub.b Al.sub.cwherein X represents at least one element selected from the group consisting of Zr and Hf, M represents at least one element selected from the group consisting of Mn, Fe, Co, Ni, and Cu, and a, b, and c represent such atomic percentages as respectively satisfy 25.ltoreq.a.ltoreq.85, 5.ltoreq.b.ltoreq.70, and 0
摘要翻译:公开了一种用于光纤连接器的套圈,其具有用于将光纤设置在其上的插入孔和用于制造光纤的方法。 套圈由具有至少玻璃化转变区域的非晶合金形成,优选玻璃化转变区域的温度宽度不低于30K。 优选地,套圈由具有由以下通式表示的组成的无定形合金形成,并且含有至少50%的体积比的非晶相:XaMbAlc,其中X表示选自Zr和Hf中的至少一种元素, M表示选自Mn,Fe,Co,Ni和Cu中的至少一种元素,a,b和c分别表示原子百分数,分别满足25≤a≤85,5, = b = 70,0
摘要:
A highly wear-resistant aluminum-based composite alloy has improved wear resistant itself and the wear amount of the opposed Fe-based material is decreased as compared with the conventional wear-resistant aluminum alloys. The inventive composite alloy has a structure that at least either a dispersing phase selected from the group consisting of hard fine particles or a solid-lubricant particles having average diameter of 10 um or less is dispersed in an aluminum-alloy matrix which contains quasi-crystals.