Preparation of Bulk Glassy Pd&lt;SUB&gt;40&lt;/SUB&gt;Ni&lt;SUB&gt;10&lt;/SUB&gt;Cu&lt;SUB&gt;30&lt;/SUB&gt;P&lt;SUB&gt;20&lt;/SUB&gt; Alloy of 40 mm in Diameter by Water Quenching

Inoue, Akihisa; Nishiyama, Nobuyuki; Matsuda, Takayuki

doi:10.2320/matertrans1989.37.181

Cited by 394 publications

(161 citation statements)

References 21 publications

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“…However, during the last decade, some exceptions have been reported because of the discoveries of stabilized supercooled liquid alloys without crystallization even during cooling at slow rates below 100 K/s [1,2]. As a result, bulk amorphous alloys have been prepared in a number of alloy systems such as Mg- [3], Ln(lanthanide)- [4], Zr- [5,6], Fe- [7], Pd-Cu- [8], Ti- [9], Ni- [10] and Co- [11] bases and have gained some applications due to their unique mechanical properties, chemical properties and good workability resulting from the amorphous structure. It has subsequently been found that the use of the stabilized liquid also gives rise to bulk amorphous alloys containing nanocrystalline [12] and nanoquasicrystalline [13] particles with good mechanical properties in the Zr-based alloy systems.…”

Section: Introductionmentioning

confidence: 99%

High-strength Zr-based bulk amorphous alloys containing nanocrystalline and nanoquasicrystalline particles

Inoue

Fan

Saida

et al. 2000

Science and Technology of Advanced Materials

115

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It was recently found that the addition of special elements leading to the deviation from the three empirical rules for the achievement of high glass-forming ability causes new mixed structures consisting of the amorphous phase containing nanoscale compound or quasicrystal particles in Zr-Al-Ni-Cu-M (M Ag, Pd, Au, Pt or Nb) bulk alloys prepared by the copper mold casting and squeeze casting methods. In addition, the mechanical strength and ductility of the nonequilibrium phase bulk alloys are significantly improved by the formation of the nanostructures as compared with the corresponding amorphous single phase alloys. The composition ranges, formation factors, preparation processes, unique microstructures and improved mechanical properties of the nanocrystalline and nanoquasicrystalline Zr-based bulk alloys are reviewed on the basis of our recent results reported over the last two years. The success of synthesizing the novel nonequilibrium, highstrength bulk alloys with good mechanical properties is significant for the future progress of basic science and engineering. ᭧

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Section: Introductionmentioning

confidence: 99%

High-strength Zr-based bulk amorphous alloys containing nanocrystalline and nanoquasicrystalline particles

Inoue

Fan

Saida

et al. 2000

Science and Technology of Advanced Materials

115

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“…The high glass-forming ability enables us to prepare bulk glassy alloys by copper mold casting or quenching the melt in a quartz tube into stirred water. As a result, a number of bulk glassy alloys have been successfully prepared in multicomponent systems such as Mg-, 2) Zr-, 3) Ti-, 4) Fe-, 5) Pd-, 6) Ni-, 7) Co- 8) and based alloys. Summarizing the features of the above-mentioned multicomponent systems, the following three empirical rules have been proposed, 10) i.e., (1) multi-component systems consisting of more than three kinds of elements, (2) significant difference in atomic size ratios above 12% among the main constituent elements, and (3) suitable negative heats of mixing among their main elements.…”

Section: Introductionmentioning

confidence: 99%

Bulk Glass Formation of Ti-Zr-Hf-Cu-M (M=Fe, Co, Ni) Alloys

Wang²,

Zhang

et al. 2002

Mater. Trans.

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196

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mold casting. The T x and T g of the glassy rod were 711 K and 658 K and T g /T m was 0.57. The bulk glassy alloy can be characterized by equal concentration of constituent elements without distinct host component. It is confirmed that more multicomponent glassy systems have a better glass-forming ability as compared with simpler alloy systems. The glassy alloy rod also exhibits good mechanical properties which are similar to those for ordinary glassy alloys. The finding of this alloy system may provide a new synthesis method of bulk glassy alloys.

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“…Since the findings of glassy-type alloys with a large supercooled liquid region in Mg-Ln-TM 2) and Ln-Al-Ni 3) (Ln = lanthanide metals) systems, followed by the successes of producing bulk glassy alloys in the Ln- 4) and based systems by the copper mold casting method, much attention has been paid to the development of new alloy systems with high glass-forming ability (GFA). As a result, bulk glassy alloy systems have been widely extended to Zr-, 6,7) Fe-, 8) Pd-Cu-, 9) Co-, 10) CuTi- 11) and Ni-Zr- 12) based alloys. Based on the features of the above-mentioned multicomponent systems, the following three empirical rules 13,14) of alloy components for the formation of bulk glassy alloys have been proposed, i.e., (1) multicomponent consisting of more than three elements, (2) significant atomic size mismatches among the main constituent elements, and (3) suitable negative heats of mixing among their elements.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ti on the Thermal Stability and Glass-Forming Ability of Ni-Nb Glassy Alloy

Zhang

Inoue

2002

Mater. Trans.

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The thermal stability, glass-forming ability (GFA) and mechanical properties of the Ni 60 Nb 40−x Ti x (x = 0 to 40) glassy alloys have been investigated. As the Ti content increases, the supercooled liquid region ∆T x (= T x − T g ) and reduced glass transition temperature (T g /T l ) increase, the maximum ∆T x of 54 K and T g /T l of 0.622 are obtained at 22.5%Ti and 15%Ti, respectively, and then the ∆T x and the T g /T l gradually decrease. The Ni 60 Nb 25 Ti 15 glassy alloy was formed in a rod form with a diameter up to 1.5 mm. The T g and T x of the bulk glassy alloy were 859 K and 906 K, respectively. The Vicker's hardness (Hv), Young's modulus (E), compressive fracture strength (σ c,f ) and compressive plastic elongation (ε c,p ) were 833, 167 GPa, 3085 MPa and 1.8%, respectively, for the bulk alloy. There is a tendency for fracture strength to increase with increasing glass transition temperature (T g ). It is therefore interpreted that the high strength is due to strong bonding nature among the constituent elements.

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Preparation of Bulk Glassy Pd<SUB>40</SUB>Ni<SUB>10</SUB>Cu<SUB>30</SUB>P<SUB>20</SUB> Alloy of 40 mm in Diameter by Water Quenching

Cited by 394 publications

References 21 publications

High-strength Zr-based bulk amorphous alloys containing nanocrystalline and nanoquasicrystalline particles

High-strength Zr-based bulk amorphous alloys containing nanocrystalline and nanoquasicrystalline particles

Bulk Glass Formation of Ti-Zr-Hf-Cu-M (M=Fe, Co, Ni) Alloys

Effects of Ti on the Thermal Stability and Glass-Forming Ability of Ni-Nb Glassy Alloy

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