Quantifying the effect of microstructure variability on the yield strength predictions of Ni-base superalloys

Tiley, J.; Kim, S.L.; Parthasarathy, Triplicane A.; Loughnane, Gregory; Kublik, Richard A.; Salem, Ayman A.

doi:10.1016/j.msea.2016.12.068

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…The reduction in average grain size with decreasing thickness is evident and was confirmed using Material Image Processing and Automated Reconstruction (MIPAR) software developed in MATLAB, to determine the number of grains per unit area and the average grain area. 20,32 This grain size determination software generates a series of apps designed to measure grain size. The results of the grain size analysis of the three Co (200, 20 and 2 nm) films are shown in Figure 13.…”

Section: High Resolution Scans-co (2 Nm)mentioning

confidence: 99%

Cleaning Solutions for Ultrathin Co Barriers for Advanced Technology Nodes

Alety

Lagudu

Popuri

et al. 2017

ECS J. Solid State Sci. Technol.

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Co, a candidate material for barrier and capping layers in 10 nm and smaller Cu interconnects, is prone to corrosion and galvanic corrosion during chemical mechanical planarization (CMP) and wet cleaning in aqueous environments posing a serious challenge to its use since the Co liner in the advanced nodes is desired to be only ∼2 to 3 nm thick. We show that E corr between Cu and Co (2 nm) films can be reduced to <10 mV, with Cu being more noble, in an aqueous solution of 6.6 mM (0.05 wt%) Glycine + 15 mM 1,2,4 Triazole, while maintaining an excellent surface finish making it an excellent cleaning solution for Cu/Co (2 nm) structures. We also show that such thin Co films behave electrochemically very differently from thicker (physical vapor deposited 200 nm and even 20 nm) films, perhaps due to differences in deposition methods, differences in surface interactions as determined by XPS and in grain sizes as revealed by SEM imaging, and that (post-CMP) cleaning solutions available for the thicker films do not work for them.

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Section: High Resolution Scans-co (2 Nm)mentioning

confidence: 99%

Cleaning Solutions for Ultrathin Co Barriers for Advanced Technology Nodes

Alety

Lagudu

Popuri

et al. 2017

ECS J. Solid State Sci. Technol.

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“…2,[4][5][6][7] Both Co and Ni have high melting points and are well known as superalloys for high-temperature applications. 8,9 Limited studies have been carried out on the combined effects of Co and Ni in Al-Si alloys. This paper reports the results of a study into the effects of Co and Ni on the microstructure and mechanical properties at room and elevated temperature of hypoeutectic Al-Si alloys produced by directional solidification in a Bridgman furnace.…”

Section: Introductionmentioning

confidence: 99%

Effect of Co and Ni Addition on the Microstructure and Mechanical Properties at Room and Elevated Temperature of an Al–7%Si Alloy

2017

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Increasing environmental demands are forcing the automotive industry to reduce vehicle emissions by producing more light-weight and fuel efficient vehicles. Al-Si alloys are commonly used in automotive applications because of excellent castability, high thermal conductivity, good wear properties and high strength-to-weight ratio. However, most of the aluminium alloys on the market exhibit significantly reduced strength at temperatures above 200°C. This paper presents results of a study of the effects of Co and Ni in a hypoeutectic Al-Si alloy on microstructure and mechanical properties at room and elevated temperature. Tensile test specimens with microstructures comparable to those obtained in high-pressure die casting, i.e. SDAS * 10 lm, were produced by directional solidification in a Bridgman furnace. The results show an improvement in tensile properties up to 230°C.

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Relation of elastic properties, yield stress and ultimate strength of polycrystalline metals to their melting and evaporation parameters with account for nano and micro structure

Polyanskiy

Belyaev

et al. 2018

Acta Mech

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Quantifying the effect of microstructure variability on the yield strength predictions of Ni-base superalloys

Cited by 8 publications

References 13 publications

Cleaning Solutions for Ultrathin Co Barriers for Advanced Technology Nodes

Cleaning Solutions for Ultrathin Co Barriers for Advanced Technology Nodes

Effect of Co and Ni Addition on the Microstructure and Mechanical Properties at Room and Elevated Temperature of an Al–7%Si Alloy

Relation of elastic properties, yield stress and ultimate strength of polycrystalline metals to their melting and evaporation parameters with account for nano and micro structure

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