共查询到17条相似文献,搜索用时 125 毫秒
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机械合金化制备金属难熔化合物 总被引:2,自引:0,他引:2
在介绍机械合金化特点的同时,重点研究和讨论了机械合金化制备金属难熔化合物的过程及机理,并认为机械合金化是制备难熔化合物及其材料的一种行之有效的方法。 相似文献
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在介绍机械合金化特点的同时,重点研究和讨论了机械合金化制备金属难熔化合物的过程及机理,并认为机械合金化是制备难熔化合物及其材料的一种行之有效的方法。 相似文献
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机械合金化制备金属间化合物机械合金化是一种用来制备过饱和固溶体、金属间化合物和非晶材料各种合金相的固态粉末工艺。该工艺减少了因两种金属熔点不同造成化合物成份分布不均匀现象。本实验用该种工艺合成了Ti-Al、Fe-Al、Nb-Al合金。用等静压方法加工... 相似文献
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机械合金化(MA)技术的新进展 总被引:9,自引:3,他引:9
论述了机械合金化技术的基本原理,介绍了机械合金化技术在弥散强化超合金、非晶态合金、磁性材料、超导合金、高熔点金属间化合物制备中应用的新进展。 相似文献
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机械合金化纳米晶材料研究进展 总被引:17,自引:0,他引:17
综述了机械合金化制备纳米晶材料的研究进展,重点介绍了高强度铝合金,铜合金,难熔金属化合物,金属储氢材料,复相烯土永磁材料等几类机械合金化纳米晶材料的制备与组织性能,指出了机械合金化技术在纳米晶材料制备方面的优势及应用前景。 相似文献
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机械合金化在Fe-Si合金制备中的应用 总被引:1,自引:0,他引:1
机械合金化是一种新的材料制备方法, 近年来在功能材料的制备中得到了广泛的应用. 该文简要回顾了机械合金化的发展历史, 阐述了机械合金化的原理及反应机制, 介绍了机械合金化技术在过饱和固溶体、非晶、纳米晶及金属间化合物等领域的应用状况. 指出机械合金化过程的热力学和动力学研究及合金相结构、性能与球磨工艺条件之间的规律是今后研究的重点, 后续处理工艺的改进是产品实现从实验室向工业应用转变的重要保证. 相似文献
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NiAl金属间化合物的研究进展 总被引:4,自引:0,他引:4
对NiAl金属间化合物的国内外研究现状如改善NiAl合金力学性能和高温抗氧化性能等所 采用的合金化、制备多相合金、制备复合材料、定向凝固、机械合金化、热压及热等静压、燃烧合成、 微晶涂层等工艺以及NiAl合金的超塑性行为进行了系统综述,着重介绍并论述了合金化及定向 凝固等工艺。此外,还介绍了NiAl合金的固溶强化磁行为。 相似文献
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Anna Knaislová Jiří Linhart Pavel Novák Filip Průša Jaromír Kopeček František Laufek 《粉末冶金学》2019,62(1):54-60
This work is devoted to the preparation of alloys based on intermetallic compounds in the Ti–Al–Si system by powder metallurgy using mechanical alloying and the spark plasma sintering (SPS) method. The aim was to describe the formation of intermetallic phases during mechanical alloying of TiAl15Si15 (wt-%) alloy and to consolidate the powder prepared by optimised conditions. Phase composition, microstructure and hardness of compacted alloy were determined. Four hours of mechanical alloying is sufficient time for preparation of pure elements free material composed only of intermetallic phases. After consolidation, the TiAl15Si15 alloy has a homogeneous structure composed of silicide (Ti5Si3) in aluminide (TiAl) matrix. The hardness of the material reaches 865?±?42 HV 5. 相似文献
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《Scripta Metallurgica et Materialia》1995,32(4):595-600
The PbTe intermetallic compound could be fabricated by mechanical alloying of elemental Pb and Te powders for 2 minutes at ball-to-powder weight ratio of 2 : 1. The lattice parameter of PbTe processed by mechanical alloying, 0.6462 nm, was in excellent agreement with the value of 0.6458 nm which was reported for PbTe powder fabricated by melting and grinding. In situ observation of the abrupt temperature rise during the ball milling process indicated that the PbTe intermetallic compound was formed by a self-sustained reaction rather than by diffusional reactions. There was no tendency for PbTe crystalline powders to be amorphized by mechanical alloying. 相似文献
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In the new millennium a trend focused on making improvements in existing technologies of powder metallurgy and on the development
of new and promising trends in the creation of powder structural materials is observed. The development of the technology
of powder metallurgy is intended to improve methods of warm and injection molding, laser and mechanical alloying, and nitration
of high-and lowalloy steels. Considerable attention has been paid to the production of structural materials made of intermetallic
compounds, materials, the properties of which exhibit functional gradients. There has also been emphasis on creating nanomaterials
fabricated by the sol-gel method, mechanical alloying, and powder spraying.
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Translated from Poroshkovaya Metallurgiya, Nos. 5–6(449), pp. 92–100, May–June, 2006. 相似文献
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Effect of cerium on microstructure,mechanical and wetting properties of Ag-Cu-Ti filler alloy was researched with optical microscopy,scanning electron microscopy and X-ray diffraction.The results indicated that addition of cerium accelerated alloying of the filler alloy,enlarged supercooled region,caused microstructural refinement and dispersed distribution of intermetallic compounds.It resulted in the increase in microhardness and shear strength of Ag-Cu-Ti filler alloy.At the same time,cerium improved wet... 相似文献
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Paustovskii Alexander V. Alfintseva Raisa A. Kurinnaya Tatyana V. Pogorelaya Valentina V. Kirilenko Stepan N. 《Powder Metallurgy and Metal Ceramics》2004,43(5-6):251-257
The main parameters of electrospark alloying of steel 45 with anodes made from Ni – Cr – Al – Y alloys have been investigated. The anodes were fabricated by casting and hot pressing. The highest values of the mass transfer coefficient were observed in the case of electrospark alloying with hot-pressed alloys. Microstructure and x-ray phase analyses of electrospark coatings revealed the presence of solid solutions based on nickel, iron, chromium as well as intermetallic compounds. Coatings obtained by electrospark alloying with hot-pressed alloy are more wear-resistant than are coatings obtained by alloying with cast alloys. 相似文献
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Mechanical alloying of brittle materials 总被引:7,自引:0,他引:7
R. M. Davis B. McDermott C. C. Koch 《Metallurgical and Materials Transactions A》1988,19(12):2867-2874
Mechanical alloying by high energy ball milling has been observed in systems with nominally brittle components. The phases
formed by mechanical alloying of brittle components include solid solutions (Si + Ge → SiGe solid solution), intermetallic
compounds (Mn + Bi → MnBi), and amorphous alloys (NiZr2 + Ni11Zr9 → amorphous Ni50Zr50). A key feature of possible mechanisms for mechanical alloying of brittle components is the temperature of the powders during
milling. Experiments and a computer model of the kinetics of mechanical alloying were carried out in order to esti-mate the
temperature effect. Temperature rises in typical powder alloys during milling in a SPEX mill were estimated to be ≤350 K using
the kinetic parameters determined from the computer model. The tempering response of fresh martensite in an Fe-1.2 wt pct
C alloy during milling was consistent with the maximum results of the computer model, yielding temperatures in the pow-ders
of ≤575 Ki.e., ΔT ≤ 300 K). Thermal activation was required for mechanical alloying of Si and Ge powder. No alloying occurred when the
milling vial was cooled by liquid nitrogen. The pos-sible mechanisms responsible for material transfer during mechanical alloying
of brittle components are considered. 相似文献