Interdiffusion in fcc Ni–X (X = Rh, Ta, W, Re and Ir) alloys

Chen, Juan; Xiao, Jinkun; Zhang, Lijun; Du, Yong

doi:10.1016/j.jallcom.2015.10.120

Cited by 52 publications

(26 citation statements)

References 21 publications

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“…In other words, the accuracy of the calculated interdiffusion coefficients is dependent on the fitting function used as well. In this work, to minimize the fitting errors, the c ‐ x profiles obtained experimentally by EPMA analysis were fitted using a Boltzmann function and cumulative distribution function (CDF), respectively . The expressions of these two adopted functions are given as follows:…”

Section: Methodsmentioning

confidence: 99%

Determination of interdiffusion coefficients of Si and Al in Ti₃SiC₂–Ti₃AlC₂ diffusion couple at 1373‐1673 K

et al. 2019

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In the diffusion couple of Ti3SiC2 and Ti3AlC2, only interdiffusion of Si and Al occurred during diffusion treatment process. Based on the concentration profiles of Si and Al measured by electron probe microanalysis (EPMA), the interdiffusion coefficients of Si and Al at 1373‐1673 K in Ti3SiC2–Ti3AlC2 diffusion couple were determined by both the Boltzmann‐Matano (B‐M) method and the Saucer‐Freise (S‐F) method. At the position of Matano plane with the composition of Ti3Al0.5Si0.5C2, the interdiffusion coefficient could be expressed as Dint (m2/s) = 5.6 × 10−4⋅exp [−246 ± 14 (kJ/mol)/RT]. Based on the two methods, the calculated interdiffusion coefficients increased with increasing temperature, and the magnitudes of their absolute values were on the order of 10–13‐10–11 m2/s at 1373‐1673 K. At 1373‐1573 K, the calculated interdiffusion coefficients decreased monotonously with the increase of Si concentration, that is, xSi/(xAl + xSi). But at 1673 K, the variation trend of interdiffusion coefficients with xSi/(xAl + xSi) was no longer monotonous, probably due to the presence of Ti5Si3 phase and voids on Ti3AlC2 side.

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Section: Methodsmentioning

confidence: 99%

Determination of interdiffusion coefficients of Si and Al in Ti₃SiC₂–Ti₃AlC₂ diffusion couple at 1373‐1673 K

et al. 2019

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“…83-2092), demonstrating that they have high crystallinity without any detectable impure phases. [25,29] Moreover, peaks associated with carbon are not observed, which can be probably attributed to its amorphous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 phase and the high pack of LiFePO 4 nanocomposites in the established carbon structure. [30] It is not difficult to find that the diffraction peak intensity of LFP-12 h is higher than LFP-18 h and LFP-24 h from Figure 2, meaning LFP-12 h has better phase and crystalline performance.…”

Section: Crystalline Structure Analysismentioning

confidence: 99%

“…Zheng et al [24] prepared hollow LiFePO 4 nanoparticles with enchanced performance using ammonium tartrate as an additive via a solvothermal technique. Chen et al [25] reported that micronanosized LiFePO 4 /C with a starfish-like structure was successfully prepared via a solvothermal route with triethylamine and it could exhibit high rate capability, excellent cycling performance and higher tap density. Wang et al [11] successfully synthesized rod-like and block-like LiFePO 4 powders by Na 2 EDTA-assisted hydrothermal synthesis method to show the excellent initial discharge property.…”

Section: Introductionmentioning

confidence: 99%

Urea and Ethylene Glycol‐Assisted Solvothermal Synthesis of Spheroidal LiFePO₄/C Nanoparticles as a Cathode Material for Lithium‐ion Batteries

Wang

Niu

et al. 2018

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Spheroidal LiFePO4/C nanoparticles were synthesized successfully via a urea and ethylene glycol‐assisted solvothermal synthetic route combined with high‐temperature calcinations under different solvothermal time and carbon coating amounts. The obtained samples were characterized with various techniques, including X‐ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and electrochemical performance experiments. The test results showed that urea as an additive plays a critical role in controlling morphologies of the final products and ethylene glycol as a stabilizer avoids the agglomeration of particles in the process. As a promising cathode material of lithium ion batteries, the LiFePO4/C in this work could provide an initiate discharge capacity of 155 mAh⋅g–1 and maintain 91.6% of initial capacity after 100 cycles at 0.1 C. The discharge capacity is 78.8 mAh⋅g–1 when circulating at high rate up to 10 C, showing excellent discharge performance. Furthermore, the in‐situ generated carbon ensures the higher electrical conductivity and the nano‐sized spheroidal LiFePO4/C particles prolong the cycle life of batteries, thus exhibiting high charge‐discharge capability, excellent rate properties and stable cycling behavior.

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“…The solid semi-infinite diffusion couple is the frequently used experimental technique for measurement of interdiffusion coefficients in the target phase. Numerous investigations on the measurement of interdiffusion coefficients by using the semi-infinite diffusion couple together with either the traditional Bolzmann-Matano method and its variants [3][4][5] for binary systems or the Matano-Kirkaldy method [6] for ternary systems can be found in the literature [2,[7][8][9][10][11][12]. Sometimes, when the total thickness of the diffusion couple is not large enough or the diffusion time is too long, diffusion distance may exceed the entire domain.…”

Section: Introductionmentioning

confidence: 99%

Application of numerical inverse method in calculation of composition-dependent interdiffusion coefficients in finite diffusion couples

et al. 2017

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The previously developed numerical inverse method was applied to determine the composition-dependent interdiffusion coefficients in single-phase finite diffusion couples. The numerical inverse method was first validated in a fictitious binary finite diffusion couple by pre-assuming four standard sets of interdiffusion coefficients. After that, the numerical inverse method was then adopted in a ternary Al-Cu-Ni finite diffusion couple. Based on the measured composition profiles, the ternary interdiffusion coefficients along the entire diffusion path of the target ternary diffusion couple were obtained by using the numerical inverse approach. The comprehensive comparison between the computational diffusion properties and the experimental data indicates that the numerical inverse method is also applicable to the high-throughput determination of the composition-dependent interdiffusion coefficients in finite diffusion couples.

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Interdiffusion in fcc Ni–X (X = Rh, Ta, W, Re and Ir) alloys

Cited by 52 publications

References 21 publications

Determination of interdiffusion coefficients of Si and Al in Ti₃SiC₂–Ti₃AlC₂ diffusion couple at 1373‐1673 K

Determination of interdiffusion coefficients of Si and Al in Ti₃SiC₂–Ti₃AlC₂ diffusion couple at 1373‐1673 K

Urea and Ethylene Glycol‐Assisted Solvothermal Synthesis of Spheroidal LiFePO₄/C Nanoparticles as a Cathode Material for Lithium‐ion Batteries

Application of numerical inverse method in calculation of composition-dependent interdiffusion coefficients in finite diffusion couples

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Interdiffusion in fcc Ni–X (X = Rh, Ta, W, Re and Ir) alloys

Cited by 52 publications

References 21 publications

Determination of interdiffusion coefficients of Si and Al in Ti3SiC2–Ti3AlC2 diffusion couple at 1373‐1673 K

Determination of interdiffusion coefficients of Si and Al in Ti3SiC2–Ti3AlC2 diffusion couple at 1373‐1673 K

Urea and Ethylene Glycol‐Assisted Solvothermal Synthesis of Spheroidal LiFePO4/C Nanoparticles as a Cathode Material for Lithium‐ion Batteries

Application of numerical inverse method in calculation of composition-dependent interdiffusion coefficients in finite diffusion couples

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Determination of interdiffusion coefficients of Si and Al in Ti₃SiC₂–Ti₃AlC₂ diffusion couple at 1373‐1673 K

Determination of interdiffusion coefficients of Si and Al in Ti₃SiC₂–Ti₃AlC₂ diffusion couple at 1373‐1673 K

Urea and Ethylene Glycol‐Assisted Solvothermal Synthesis of Spheroidal LiFePO₄/C Nanoparticles as a Cathode Material for Lithium‐ion Batteries