High-Strength Cu-Based Bulk Glassy Alloys in Cu-Zr-Ti-Be System

Inoue, Akihisa; Zhang, Tao; Kurosaka, Kei; Zhang, Wei

doi:10.2320/matertrans.42.1800

Cited by 81 publications

(70 citation statements)

References 17 publications

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“…It has previously been reported that the tensile fracture strength of the Cu-Zr-Ti alloy increases further to about 2500 MPa for the more multi-component Cu-based alloys caused by the addition of Be or Y. 21,23) A very large supercooled liquid region with the temperature interval above 100 K is also obtained for the Cu-Hf-Al base alloys containing 5 at %Ag or Pd and the largest ÁT x reaches as large as 110 K 24) which is the largest value for all late transition metal base bulk glassy alloys.…”

Section: Ni-and Cu-based Bulk Glassy Alloysmentioning

confidence: 99%

“…Under the above-described severely limited situation of bulk glassy alloy systems, we succeeded in fabricating Fe-based bulk glassy alloys in Fe-Al-Ga-P-C-B system in 1995. 8) Since then, we have also synthesized a variety of Fe-based bulk glassy alloys, [9][10][11][12][13] followed by Cobased bulk glassy alloys, [14][15][16] Ni-based bulk glassy alloys [17][18][19] and then Cu-based bulk glassy alloys [20][21][22][23][24] through alloy searches on the basis of the three empirical component rules for stabilization of supercooled metallic liquid. [4][5][6] It has subsequently been found that the late transition metal base bulk glassy alloys exhibit various unique properties which have not been obtained for any kind of crystalline alloys.…”

Section: Introductionmentioning

confidence: 99%

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Developments and Applications of Bulk Glassy Alloys in Late Transition Metal Base System

Inoue

Shen

Takeuchi

2006

MATERIALS TRANSACTIONS

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We review our recent results of the formation, fundamental properties, workability and applications of late transition metal base bulk glassy alloys which have been developed after the first synthesis of Fe-based bulk glassy alloys by the copper mold casting method in 1995. The late metal transition base bulk glassy alloys were obtained in Fe-(Al,Ga)-(P,C,B,Si), Fe-(Cr,Mo)-(C,B), Fe-(Zr,Hf,Nb,Ta)-B, Fe-Ln-B(Ln=lanthanide metal), Fe-B-Si-Nb and Fe-Nd-Al for Fe-based alloys, Co-(Ta,Mo)-B and Co-B-Si-Nb for Co-based alloys, Ni-Nb-(Ti,Zr)-(Co,Ni) for Ni-based alloys, and Cu-Ti-(Zr,Hf), Cu-Al-(Zr,Hf), Cu-Ti-(Zr,Hf)-(Ni,Co) and Cu-Al-(Zr,Hf)-(Ag,Pd) for Cu-based alloys. These bulk glassy alloys exhibit useful engineering properties of high mechanical strength, large elastic elongation and high corrosion resistance. In addition, Fe-and Co-based bulk glassy alloys have good soft magnetic properties which cannot be obtained for conventional amorphous and crystalline type magnetic alloys. The Fe-and Ni-based bulk glassy alloys have already been used in some application fields. These late transition metal base bulk glassy alloys are promising as new metallic engineering materials.

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Section: Ni-and Cu-based Bulk Glassy Alloysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Developments and Applications of Bulk Glassy Alloys in Late Transition Metal Base System

Inoue

Shen

Takeuchi

2006

MATERIALS TRANSACTIONS

Self Cite

119

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“…The tensile strength level has been reported to be 1500 to 1800 MPa for Zr-based alloys, 1600 MPa for Pd-based alloys, 1200 MPa for Labased alloys and 800 MPa for Mg-based alloys. Very recently, new Cu-based bulk glassy alloys with high tensile strength and significant plastic elongation have been formed in Cu-Zr-Ti, 10) Cu-Hf-Ti, 11) Cu-Zr-Hf-Ti, 12) Cu-Zr-Ti-Y, 13) Cu-Zr-Ti-Be 14) and Cu-Zr-Ti-(Nb, Ta) 15) systems. The tensile strength level for the Cu 60 Zr 30 Ti 10 glassy alloy reaches 2000 MPa and the corrosion behavior of the Cu 60 Zr 30 Ti 10 and Cu-Zr-Ti-(Mo, Ta and Nb) glassy alloys has been reported in various solutions in detail.…”

Section: Introductionmentioning

confidence: 99%

Effects of Additional Elements on the Glass Formation and Corrosion Behavior of Bulk Glassy Cu-Hf-Ti Alloys

et al. 2003

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New bulk glassy (Cu 0:6 Hf 0:25 Ti 0:15 ) 98 M 2 (M = Mo, Ta and Nb) alloys with high thermal stability were synthesized and the effects of additional elements Mo, Ta and Nb on the glass formation and corrosion behavior were examined. The maximum diameter for glass formation of the 2 at%Mo, 2 at%Ta and 2 at%Nb alloys was 1.5 mm, 3.5 mm and 4.0 mm, respectively. The corrosion behavior of the Cu-Hf-Ti-(Mo, Ta and Nb) glassy alloys was examined by weight loss and electrochemical measurements. By substitution of 2 at%Mo, Ta or Nb for the Cu 60 Hf 25 Ti 15 alloy, the corrosion rates of the alloys decreased to 1=2 in 1 N HCl and two orders of magnitude in 3% NaCl solution. It was also found that substitution of elements Mo, Ta and Nb for the Cu 60 Hf 25 Ti 15 glassy alloy was effective on decreasing anodic passive current density in 3% NaCl solution.

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“…It is interpreted that the glassy phase still coexists with a crystalline phase in the φ2.0 mm rod. Figure 7 shows a stress-elongation curve under a compressive applied load for the bulk glassy Ni 60 Nb 25 Ti 15 alloy rod of 1.5 mm in diameter. The alloy exhibits good mechanical properties, i.e., 167 GPa for Young's modulus (E), 3085 MPa for compressive fracture strength (σ c,f ) and 1.8% for compressive plastic elongation (ε c,p ).…”

Section: Formation Of Bulk Glassy Alloysmentioning

confidence: 99%

“…13,14) Good mechanical properties are obtained for bulk glassy alloys in the Ln-, 16) Mg-, 5) Zr-, 17,18) and the Pd-Cu- 19) based systems, but the compressive fracture strength level of these glassy alloys is less than 2000 MPa. Recently, it has been reported that the Hf-, 20) Ni- 21) and a series of Cu-based [22][23][24][25][26] bulk glassy alloys exhibit high compressive fracture strength of 2000 to 2700 MPa. Very recently, we have succeeded in finding new Ni-based bulk glassy alloys with high compressive fracture strength of over 3000 MPa in Ni-Nb-Ti ternary system.…”

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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High-Strength Cu-Based Bulk Glassy Alloys in Cu-Zr-Ti-Be System

Cited by 81 publications

References 17 publications

Developments and Applications of Bulk Glassy Alloys in Late Transition Metal Base System

Developments and Applications of Bulk Glassy Alloys in Late Transition Metal Base System

Effects of Additional Elements on the Glass Formation and Corrosion Behavior of Bulk Glassy Cu-Hf-Ti Alloys

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

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