A combinatorial thin film sputtering approach for synthesizing and characterizing ternary ZrCuAl metallic glasses

Deng, Yaxin; Guan, Yunxia; Fowlkes, Jason D.; Wen, Songqing; Liu, F.X.; Pharr, George M.; Liaw, Peter K.; Liu, C.T.; Rack, Philip D.

doi:10.1016/j.intermet.2007.02.011

Cited by 70 publications

(31 citation statements)

References 37 publications

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“…Our simple computational model for metal and metalloid atomic species provides the capability to perform more efficient and exhaustive combinatorial searches to identify novel ternary, quaternary, and multi-component glass-forming alloys. The smaller set of alloys that are predicted from simulations to possess slow critical cooling rates can then be tested experimentally using combinatorial sputtering [34] and other high-throughput BMG characterization techniques [35].…”

Section: Discussionmentioning

confidence: 99%

The glass-forming ability of model metal-metalloid alloys

Zhang

Liu

Schroers

et al. 2015

The Journal of Chemical Physics

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Bulk metallic glasses (BMGs) are amorphous alloys with desirable mechanical properties and processing capabilities. To date, the design of new BMGs has largely employed empirical rules and trial-and-error experimental approaches. Ab initio computational methods are currently prohibitively slow to be practically used in searching the vast space of possible atomic combinations for bulk glass formers. Here, we perform molecular dynamics simulations of a coarse-grained, anisotropic potential, which mimics interatomic covalent bonding, to measure the critical cooling rates for metalmetalloid alloys as a function of the atomic size ratio σS/σL and number fraction xS of the metalloid species. We show that the regime in the space of σS/σL and xS where well-mixed, optimal glass formers occur for patchy and LJ particle mixtures coincides with that for experimentally observed metal-metalloid glass formers. Our simple computational model provides the capability to perform combinatorial searches to identify novel glass-forming alloys.

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Section: Discussionmentioning

confidence: 99%

The glass-forming ability of model metal-metalloid alloys

Zhang

Liu

Schroers

et al. 2015

The Journal of Chemical Physics

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“…[14] Although reliable, this one-at-a-time trial and error approach is impractical for interrogating the extensive composition space of multicomponent alloys, motivating the recent developments by several groups toward a combinatorial paradigm for BMG discovery and design. [15][16][17][18] Many of these combinatorial studies utilize magnetron co-sputtering to deposit thin film composition libraries. However, the extreme quench rates in vapor deposition processes may result in amorphous structures very different from those obtained by cooling from the molten state, limiting their utility for further screening of properties.…”

Section: Introductionmentioning

confidence: 99%

A Laser Deposition Strategy for the Efficient Identification of Glass-Forming Alloys

Tsai

Flores

2015

Metall Mater Trans A

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Compositionally graded Cu-Zr specimens covering a wide composition range (30 to 60 at. pct Zr) were fabricated by direct laser deposition. By observing the surface topography of the as-fabricated specimens with differential interference contrast microscopy, primarily amorphous regions corresponding to compositions of high glass-forming ability were rapidly identified. Electron diffraction results confirmed the relationship between surface topography and atomic structure. The compositional widths of the amorphous regions were observed to narrow with increasing heat input from the laser, enabling further identification of local maxima in the glassforming landscape of Cu-Zr alloys. In this work, we report two peaks in the glass-forming ability, located at Cu 64.7 Zr 35.3 and Cu 50.2 Zr 49.8 . These two compositions find excellent agreement with previously reported results based on casting of discrete compositions.

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“…Amongst them, magnetron sputtering shows the advantages over others for its high deposition rate, widely controllable composition and microscopic structure [14e19]. To fabricate multicomponent alloy films by magnetron sputtering, it usually requires multiple targets corresponding to each constituent element for composition control [5,15,16]. Since good glass formers with sufficiently wide supercooled liquid regions and stable supercooled liquid states for die-forging and thermoplastic forming [7,12] are usually quaternary or higher alloys [1,4,12], growing multicomponent metallic glass films using multiple-target sputtering are expensive and complicated in both materials and fabrication process.…”

Section: Introductionmentioning

confidence: 99%