Spark plasma sintering of Fe-based structural amorphous metals (SAM) with Y2O3 nanoparticle additions

Graeve, Olivia A.; Kanakala, Raghunath; Kaufman, Larry; Sinha, Kaustav; En-hai, Wang; Pearson, B.R.; Rojas-George, G.; Farmer, Joseph C.

doi:10.1016/j.matlet.2008.01.092

Cited by 41 publications

(29 citation statements)

References 3 publications

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“…The bulk density of the SAM2X5-600 samples used in this study was 7.9 g/cm 3 and agrees well with our previous results that consider both the theoretical value for SAM2X5 powder (7.75 g/cm 3 ) and structural relaxation that occurs during the consolidation process [12][13][14]. The (identical) processing technique has been used in [12] to produce an amorphous alloy.…”

Section: Resultssupporting

confidence: 90%

“…Bulk SAM2X5 samples were produced using spark plasma sintering (SPS), as previously reported [12][13][14]. SAM2X5 powders were produced by gas atomization and were milled using a Fritsch P5 planetary high-energy ball mill.…”

Section: Methodsmentioning

confidence: 99%

“…While numerous methods to measure mechanical properties of macroscale samples exist, standard testing procedures are often impossible to implement for marginal metallic glass formers because processing limits the sample sizes that can be obtained of these materials. Spark plasma sintering [9][10][11] can overcome this sample size issue for some marginal glass formers so that macroscale properties can be measured [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Phan

Kelly

Kassner

et al. 2016

Journal of Metallurgy

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We developed a unique three-point bend testing apparatus to measure bulk mechanical properties of a model metallic glass alloy (SAM2X5 with nominal composition Fe 49.7 Cr 17.1 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 ) prepared by spark plasma sintering. The relatively large sample sizes in the present work allowed for the preparation of test specimens with a macroscale cross section (in the millimeter range) with well-controlled sample dimensions closer to standardized tests. Wire saw cutting allowed for a relatively sharp notch radius (3x smaller than previous studies) and minimal sample damage. We determined that Young's modulus and notch fracture toughness measured by our three-point bending apparatus are 230 GPa and 4.9 MPa⋅m 1/2 . Also, Vickers indentation and flexure testing provided consistent results for Young's modulus. Indentation fracture toughness measured by Vickers indentation produced values at least 50% lower than by flexure. The microscale mechanical properties testing technique presented in this work and subsequent analyses are applicable to specimens of other compositions or ones prepared by other methods.

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Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Phan

Kelly

Kassner

et al. 2016

Journal of Metallurgy

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“…[8,[12][13][14][15][16] The addition of second phase particles to the metallic glass is a promising method to hinder propagation of a single shear band leading to catastrophic failure and to promote the formation of multiple shear bands that propagate collectively to enable plastic flow. [12][13][14]16] There are two ways to introduce the secondary phase, either by an in situ phase precipitated during cooling from the melt or by an ex situ addition of crystalline particles into the BMG matrix.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of an Fe‐Based SAM2×5‐630 Metallic Glass Matrix Composite with Tungsten Particle Additions

et al. 2018

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We present the role of tungsten additions on the mechanical properties of a Fe-based structural amorphous metal (SAM2Â5-630) containing crystalline tungsten. Matrix cracking by microindentation is inhibited by the addition of tungsten and indicates that tungsten improves the fracture toughness. Response surfaces from nanoindentation arrays indicate that the hardness and modulus of the matrix phase are increased by tungsten additions. Bulk composites with 30 vol% tungsten subjected to 4-point flexure exhibited brittle fracture behavior and the characteristic strength and Weibull modulus were 165 and 8.7 MPa, respectively. The addition of tungsten did not cause devitrification of the matrix phase.

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“…The Fe-based amorphous alloys with Y addition also exhibit excellent formability with possibilities to fabricate rod shaped samples with a maximum diameter of up to 12 mm using casting techniques [24]. The bulk shapes of Fe-based amorphous alloys have also been produced by spark plasma sintering (SPS) using starting amorphous alloy powder [25][26][27]. The tribological performance is likely to be important for further development of applications of this attractive amorphous alloy system.…”

Section: Introductionmentioning

confidence: 99%

Dry Sliding Wear Behavior of Spark Plasma Sintered Fe-Based Bulk Metallic Glass/Graphite Composites

Alavi

Harimkar

2016

Technologies

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Bulk metallic glass (BMG) and BMG-graphite composites were fabricated using spark plasma sintering at the sintering temperature of 575 • C and holding time of 15 min. The sintered composites exhibited partial crystallization and the presence of distributed porosity and graphite particles. The effect of graphite reinforcement on the tribological properties of the BMG/graphite composites was investigated using dry ball-on-disc sliding wear tests. The reinforcement of graphite resulted in a reduction in both the wear rate and the coefficient of friction as compared to monolithic BMG samples. The wear surfaces of BMG/graphite composites showed regions of localized wear loss due to microcracking and fracture, as was also the case with the regions covered with graphite-rich protective film due to smearing of pulled off graphite particles.

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Spark plasma sintering of Fe-based structural amorphous metals (SAM) with Y2O3 nanoparticle additions

Cited by 41 publications

References 3 publications

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Mechanical Properties of an Fe‐Based SAM2×5‐630 Metallic Glass Matrix Composite with Tungsten Particle Additions

Dry Sliding Wear Behavior of Spark Plasma Sintered Fe-Based Bulk Metallic Glass/Graphite Composites

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