A study of nickel and cobalt silicides formed in the Ni/Co/Si(1 0 0) system by thermal annealing

Sedrati, C.; Bouabellou, A.; Kabir, A.; Haddad, R.; Boudissa, M.; Taabouche, Adel; Fiad, H.; Hammoudi, A.

doi:10.2478/msp-2020-0057

Cited by 2 publications

(2 citation statements)

References 24 publications

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“… 30 For sample 3.8R, these two broad peaks get much weaker, indicating the beginning of the recrystallization of the amorphous Si capping layer. For sample 4.0R, one peak at around 150 cm –1 and another peak at around 200 cm –1 appear, corresponding to Co 2 Si and CoSi, 31 respectively. It means that sample 4.0R contains two phases.…”

Section: Resultsmentioning

confidence: 98%

B20 Weyl Semimetal CoSi Film Fabricated by Flash-Lamp Annealing

Yuan

Hübner

et al. 2023

ACS Appl. Mater. Interfaces

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B20-CoSi is a newly discovered Weyl semimetal that crystallizes into a noncentrosymmetric crystal structure. However, the investigation of B20-CoSi has so far been focused on bulk materials, whereas the growth of thin films on technology-relevant substrates is a prerequisite for most practical applications. In this study, we have used millisecond-range flash-lamp annealing, a nonequilibrium solid-state reaction, to grow B20-CoSi thin films. By optimizing the annealing parameters, we were able to obtain thin films with a pure B20-CoSi phase. The magnetic and transport measurements indicate the appearance of the charge density wave and chiral anomaly. Our work presents a promising method for preparing thin films of most binary B20 transition-metal silicides, which are candidates for topological Weyl semimetals.

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Section: Resultsmentioning

confidence: 98%

B20 Weyl Semimetal CoSi Film Fabricated by Flash-Lamp Annealing

Yuan

Hübner

et al. 2023

ACS Appl. Mater. Interfaces

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“…One of the crucial problems during the production of austenitic steel forgings is increased adhesion of the charge material-chromium-nickel steel with the nickel content of 24-35% and chromium content of 14-20%-to the tool substrate (in the case of the first operation-extrusion-to the die, and the second operation-to the punch) made of tool steel [1]. This results from the difficulty in shaping steel with a high content of nickel and a poor selection of the process parameters [16,17]. As a result of high pressures at high temperatures as well as a long path of friction, in the case of the punch used in the second forging operation, we observe wear [18] (mainly abrasive wear as well as material tempering causing plastic deformation) of the so-called "calotte" on the head surface in the tool axis.…”

Section: Introductionmentioning

confidence: 99%

Wear Analysis of Forging Tools Used in an Industrial Production Process—Hot Forging in Closed Dies of the “Head-Disk” of an Engine Valve Forging

et al. 2021

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The article performs an analysis of the durability of punches applied in the process of producing a valve forging from chromium-nickel steel. A forging of this type is made in two operations: coextrusion of a long shank, followed by finishing forging in closed dies of the valve head. The product obtained in this way (after other additional finishing procedures) constitutes the key element of the combustion engine (resistant to high pressures and temperatures) in motor trucks. Unfortunately, a significant problem in this production process is a relatively low durability of the forging tools, especially the punch used in the second forging operation. The key element at this stage, deciding about the punch’s further operation, is the area of the so-called “calotte”. The short-term life of the tools results from very hard performance conditions present during the forging process (periodical high mechanical and thermal loads, long path of friction). The latter cause intensive abrasive wear as well as high adhesion of the forging material to the tool surface. Based on the performed studies, including the following: technology analysis, numerical modelling, macro analyses combined with 3D scanning of tool sections as well as microstructural tests and hardness measurements, it was established that it is crucial to properly select the process parameters (charge and tool temperature, tribological conditions), as even slight changes introduced into them significantly affect the operation time of the forging tools. Mastering and proper implementation of the analyzed forging technology requires numerous further studies and tests, which will enable its perfection and thus increase the durability of the tools as well as the quality of the produced items.

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A study of nickel and cobalt silicides formed in the Ni/Co/Si(1 0 0) system by thermal annealing

Cited by 2 publications

References 24 publications

B20 Weyl Semimetal CoSi Film Fabricated by Flash-Lamp Annealing

B20 Weyl Semimetal CoSi Film Fabricated by Flash-Lamp Annealing

Wear Analysis of Forging Tools Used in an Industrial Production Process—Hot Forging in Closed Dies of the “Head-Disk” of an Engine Valve Forging

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