Aluminum Coating Influence on Nitride Layer Performance Deposited by MO-CVD in Fluidized Bed on Austenitic Stainless Steel Substrate

Găluşcă, Dan Gelu; Perju, Manuela Cristina; Nejneru, Carmen; Burduhos-Nergis, Dumitru Doru; Lăzărescu, I E

doi:10.1088/1757-899x/374/1/012020

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…The latter in situ formed Al x M y phase could be tentatively assigned to Al 25 Ni 75 . [ 55 ] Although, the shift of Li 1s and Mn 2p 3/2 peaks to lower binding energies (as shown in Table S2, Supporting Information) compared to their values measured in the pristine (uncoated) material can point to some chemical interactions or ion exchange of Al with Li and Mn, in the outermost surface layer. It should be noted that a probable formation mechanism of the hypothesized AlNi alloy during ALD process would definitely be complex and questionable (beyond the scope of this work).…”

Section: Resultsmentioning

confidence: 99%

Understanding the Role of Alumina (Al₂O₃), Pentalithium Aluminate (Li₅AlO₄), and Pentasodium Aluminate (Na₅AlO₄) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li₂MnO₃·0.67Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Enhanced Electrochemical Performance

Maiti

Sclar

Sharma

et al. 2020

Adv Funct Materials

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The active role of alumina, pentalithium aluminate (Li5AlO4, Li‐aluminate), and pentasodium aluminate (Na5AlO4, Na‐aluminate) as the surface protection coatings produced via atomic layer deposition on Li and Mn‐rich NCM cathode materials 0.33Li2MnO3·0.67LiNi0.4Co0.2Mn0.4O2 is discussed. A notable improvement in the electrochemical behavior of the coated cathodes has been found while tested in Li‐coin cells at 30 °C. Though all the coated cathodes demonstrate enhanced electrochemical cycling and rate performances, Na‐aluminate coated cathodes exhibit exemplary behavior. Prolonged cycling and rate capability testing demonstrate that after more than 400 cycles at 1 C rate, the uncoated cathode delivers only 63 mAh g−1, while those with alumina, Li‐aluminate, and Na‐aluminate coatings exhibit approximately two times higher specific capacities. The coated cathodes display steady average discharge potential and lower evolution of the voltage hysteresis during prolonged cycling compared to the uncoated cathode. Importantly, Na‐aluminate coated cathode shows a lowering in gases (O2, CO2, H2, etc.) evolution. Post‐cycling analysis of the electrodes demonstrates higher morphological integrity of the coated cathode materials and lower transition metals dissolution from them. The coatings mitigate undesirable side reactions between the electrodes and the electrolyte solution in the cells.

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Section: Resultsmentioning

confidence: 99%

Understanding the Role of Alumina (Al₂O₃), Pentalithium Aluminate (Li₅AlO₄), and Pentasodium Aluminate (Na₅AlO₄) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li₂MnO₃·0.67Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Enhanced Electrochemical Performance

Maiti

Sclar

Sharma

et al. 2020

Adv Funct Materials

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“…The first step was the introduction of the Al precursor; the low-energy metalorganic bonds can be broken at relatively low temperatures (~200-250 • C) [7,8]. The ion formed as a result will connect with the surface oxygen: Then, the chamber is purged and hydrazinium chloride is introduced.…”

Section: Discussionmentioning

confidence: 99%

“…Being such an attractive semi-conductive material, it is well expected for there to be a plethora of studies and reports featuring AlN deposited by a variety of multiple tools (magnetron sputtering, ion-beam deposition, metalorganic vapor-phase epitaxy etc.) [7][8][9][10][11]. This particular paper focuses on the atomic layer deposition (ALD) method.…”

Section: Introductionmentioning

confidence: 99%

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Aluminum Nitride Nanofilms by Atomic Layer Deposition Using Alternative Precursors Hydrazinium Chloride and Triisobutylaluminum

et al. 2020

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The aim of this study is motivated by the pursuit to investigate the performance of new and as yet untested precursors such as hydrazinium chloride (N2H5Cl) and triisobutylaluminum Al(C4H9)3 in the AlN atomic layer deposition (ALD) process as well as to study effects of successive annealing on the quality of the resulting layer. Both precursors are significantly cheaper than their conventional counterparts while also being widely available and can boast easy handling. Furthermore, Al(C4H9)3 being a rather large molecule might promote steric hindrance and prevent formation of undesired hydrogen bonds. Chemical analysis is provided by X-ray photoelectron spectroscopy (XPS) and secondary-ion mass spectrometry (SIMS) techniques; surface morphology was studied using atomic force microscopy (AFM). Chlorine containing precursors such as AlCl3 are usually avoided in ALD process due to the risk of chamber contamination. However, experimental data of this study demonstrated that the use of N2H5Cl does not result in chlorine contamination due to the fact that temperature needed for HCl molecules to become reactive cannot be reached within the AlN ALD window (200–350 °C). No amount of chlorine was detected even by the most sensitive techniques such as SIMS, meaning it is fully removed out of the chamber during purge stages. A part of the obtained samples was subjected to annealing (1350 °C) to study effects of high-temperature processing in nitrogen atmosphere, the comparisons with unprocessed samples are provided.

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“…Three times tempering provides the best properties of tool steels [13,14]. At the first tempering the retained austenite is destabilized [15][16]. Second tempering is performed to obtain the desired hardness based on the steel grade tempering diagram and it is possibly further transformation of retained austenite to martensite.…”

Section: Fig 2 the Hardness Of Martensite As A Function Of Carbon Contentmentioning

confidence: 99%

The Possibilities of the Retained Austenite Reduction on Tool Steels

Tóth

2021

EJMSE

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The retained austenite induces a great deal of internal stress in the steel, often manifesting itself as cracks. Retained austenite also have a negative effect on dimensional stability of the steel components. In tool steels retained austenite is considered to be highly detrimental and is the cause of many application failures. Tool steels must be able to attain high hardness, high compressive strength, good toughness to be suitable for forming of advanced high-strength steels. The high alloying elements content tool steels result is low martensite start and martensite finish temperatures. As a result, the transformation of austenite to martensite does not go to completion when quenching to room temperature. In this work the effects of tempering and cryogenic treatment were investigated for reducing the amount of residual austenite in case of a cold work tool steel and a hot work tool steel. The results showed that in the case of tool steels, during high hardening and three times tempering at high temperatures, the amount of residual austenite was significantly reduced and as a result of cryogenic treatment completely disappeared.

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Aluminum Coating Influence on Nitride Layer Performance Deposited by MO-CVD in Fluidized Bed on Austenitic Stainless Steel Substrate

Cited by 4 publications

References 6 publications

Understanding the Role of Alumina (Al₂O₃), Pentalithium Aluminate (Li₅AlO₄), and Pentasodium Aluminate (Na₅AlO₄) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li₂MnO₃·0.67Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Enhanced Electrochemical Performance

Understanding the Role of Alumina (Al₂O₃), Pentalithium Aluminate (Li₅AlO₄), and Pentasodium Aluminate (Na₅AlO₄) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li₂MnO₃·0.67Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Enhanced Electrochemical Performance

Aluminum Nitride Nanofilms by Atomic Layer Deposition Using Alternative Precursors Hydrazinium Chloride and Triisobutylaluminum

The Possibilities of the Retained Austenite Reduction on Tool Steels

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Aluminum Coating Influence on Nitride Layer Performance Deposited by MO-CVD in Fluidized Bed on Austenitic Stainless Steel Substrate

Cited by 4 publications

References 6 publications

Understanding the Role of Alumina (Al2O3), Pentalithium Aluminate (Li5AlO4), and Pentasodium Aluminate (Na5AlO4) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li2MnO3·0.67Li(Ni0.4Co0.2Mn0.4)O2 for Enhanced Electrochemical Performance

Understanding the Role of Alumina (Al2O3), Pentalithium Aluminate (Li5AlO4), and Pentasodium Aluminate (Na5AlO4) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li2MnO3·0.67Li(Ni0.4Co0.2Mn0.4)O2 for Enhanced Electrochemical Performance

Aluminum Nitride Nanofilms by Atomic Layer Deposition Using Alternative Precursors Hydrazinium Chloride and Triisobutylaluminum

The Possibilities of the Retained Austenite Reduction on Tool Steels

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Product

Resources

About

Understanding the Role of Alumina (Al₂O₃), Pentalithium Aluminate (Li₅AlO₄), and Pentasodium Aluminate (Na₅AlO₄) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li₂MnO₃·0.67Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Enhanced Electrochemical Performance

Understanding the Role of Alumina (Al₂O₃), Pentalithium Aluminate (Li₅AlO₄), and Pentasodium Aluminate (Na₅AlO₄) Coatings on the Li and Mn‐Rich NCM Cathode Material 0.33Li₂MnO₃·0.67Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Enhanced Electrochemical Performance