Unveil the local phase separation in PdRu immiscible alloy based on pair distribution function and energy dispersive spectroscopy

ABSTRACTZr-based alloy ingots with nominal compositions of Zr52.5Cu17.9Ni14.6Al10.0Ti5.0 (at.%), Vitre-loy 105, were isothermally annealed below the glass-transition temperature at 630 K for 10, 20, 30, 40, and 60 minutes in vacuum to obtain samples with various states of structural relaxation and compared to the as-cast state. Structural studies were performed using time-of-flight neutron diffraction followed by pair distribution function (PDF) analyses. Differential scanning calo-rimetry (DSC) was conducted to examine changes in the specific heat, which were correlated to the amount of structural relaxation in the various samples. These samples exhibited increasing structural relaxation with longer annealing times, which was evidenced in the atomic PDF. Relaxation related to the exothermic peak results in changes in the PDF that are consistent with the elimination of short and long inter-atomic distances. Further annealing led to rearrangements in the second atomic shell that may be related to local phase separation.

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Use of Atomic Pair Distribution Function (PDF) and X-Ray Scattering Methods to Assess the Stability of Amorphous Organic Compounds

10.26226/morressier.57d6b2b6d462b8028d88e418 ◽

2016 ◽

Author(s):

Detlef Beckers

Keyword(s):

Distribution Function ◽

Organic Compounds ◽

Pair Distribution Function ◽

X Ray ◽

Atomic Pair Distribution Function ◽

X Ray Scattering ◽

Atomic Pair ◽

The Stability ◽

Ray Scattering

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Real-Space X-Ray Pair Distribution Function Analysis and Molecular-Dynamics Modelling of Diflunisal Channel Hydrates

10.26434/chemrxiv.12837524 ◽

2020 ◽

Author(s):

Anuradha Pallipurath ◽

Francesco Civati ◽

Jonathan Skelton ◽

Dean Keeble ◽

Clare Crowley ◽

...

Keyword(s):

Molecular Dynamics ◽

Distribution Function ◽

Structural Dynamics ◽

First Principles ◽

Pair Distribution Function ◽

Function Analysis ◽

Real Space ◽

X Ray ◽

Dynamics Modelling ◽

Dynamics Simulations

X-ray pair distribution function analysis is used with first-principles molecular dynamics simulations to study the co-operative H2O binding, structural dynamics and host-guest interactions in the channel hydrate of diflunisal.

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Engineering Porosity Through Defects in a Giant Pore Metal–Organic Framework

10.26434/chemrxiv.12847574.v1 ◽

2020 ◽

Author(s):

Adam Sapnik ◽

Duncan Johnstone ◽

Sean M. Collins ◽

Giorgio Divitini ◽

Alice Bumstead ◽

...

Keyword(s):

Distribution Function ◽

Ball Milling ◽

Local Structure ◽

Pair Distribution Function ◽

Function Analysis ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Defect Engineering ◽

Metal Organic ◽

Unsaturated Metal Sites

Defect engineering is a powerful tool that can be used to tailor the properties of metal–organic frameworks (MOFs). Here, we incorporate defects through ball milling to systematically vary the porosity of the giant pore MOF, MIL-100 (Fe). We show that milling leads to the breaking of metal–linker bonds, generating more coordinatively unsaturated metal sites, and ultimately causes amorphisation. Pair distribution function analysis shows the hierarchical local structure is partiallyretained, even in the amorphised material. We find that the solvent toluene stabilises the MIL-100 (Fe) framework against collapse and leads to a substantial rentention of porosity over the non-stabilised material.

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Pengaruh implantasi ion tin (Titanium Nitrida) terhadap sifat mekanis baja VCL 140

Jurnal POLIMESIN ◽

10.30811/jp.v8i1.1337 ◽

2010 ◽

Vol 8 (1) ◽

pp. 753

Author(s):

Muhammad Muhammad

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Energy Dispersive Spectroscopy ◽

Energy Dispersive ◽

Scanning Electron

Implantasi ion dapat meningkatkan sifat mekanik seperti kekerasan bahan yang akan digunakan untuk komponen dan peralatan proses manufaktur. Implantasi ion dipengaruhi oleh jenis ion dopan, waktu dan energi yang digunakan. Penelitian ini dilakukan untuk mengetahui pengaruh energi dan waktu implantasi ion titanium nitrida terhadap kekerasan dan struktur mikro pada baja VCL 140. Implantasi dilakukan pada arus berkas tetap 10 yA. Variasi waktu 60, 70, 80, 90, 100, 110, 120 menit, energi 75 keV dan variasi energi 15, 30, 45, 60, 75, 90 dan 100 keV dengan waktu implantasi 100 menit dilakukan untuk mendapatkan kekerasan optimum. Uji Kekerasan menggunakan metode Vickers dengan beban 10 gram dan waktu 10 detik. Topografi dari lapisan TIN diamati menggunakan scanning electron microscopy (SEM) dan komposisi kimia dari lapisan TIN dianalisa menggunakan energy dispersive spectroscopy (EDS).Kata kunci : Implantasi ion, VCL 140, kekerasan

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