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Applied Sciences
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Advances in Surface Characterisation and Surface Modification of the Materials
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Advances in Surface Characterisation and Surface Modification of the Materials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 2704

Special Issue Editor

Prof. Dr. Tomasz Chmielewski

E-Mail Website
Guest Editor
Institute of Manufacturing Technologies, Warsaw University of Technology, 85 Narbutta Str., 02-524 Warsaw, Poland
Interests: welding and surface engineering; thermal spraying; coatings; surface modification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Section “Advances in Surface Characterisation and Surface Modification of the Materials” of Applied Sciences covers an important domain of research and development. At present, this field has reached such a mature level that it is prevalent in production and remanufacturing processes of advanced machine parts. Many domains of activities are concerned, ranging from maritime to the oil industry, including agriculture, aeronautics, communications, energy, etc. Recent time parallel to surface modification of the surface characterisation plays an important role in surface properties’ consciousness development.

This Special Issue intends to gather original scientific peer-reviewed articles and review articles featuring important and recent developments or achievements of surface characterisation and modifications with a special emphasis on real or potential applications. The authors are well-known experts in their domains who are invited to submit their contribution at any moment from now to the end of (suitable date). The papers can cover either experimental or theoretical aspects or both. Thermal spray, laser and plasma cladding, friction surfacing of the materials, surface characterization, etc., of modern engineer materials.

Prof. Dr. Tomasz Chmielewski
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • surface modification
  • surface characterisation
  • thermal spray
  • laser cladding
  • plasma cladding
  • friction surfacing
  • surface remanufacturing
  • PVD
  • CVD

Published Papers (2 papers)

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Research

15 pages, 7397 KiB  
Article
Study on the Rate of the Removal of Nano-Crystalline Diamond—Coated Materials by Femtosecond Laser Etching
by Lujun Ren, Yuping Ma, Haisong Cao, Xingxing Zhang, Yuan Han and Chao Wei
Appl. Sci. 2023, 13(17), 9864; https://doi.org/10.3390/app13179864 - 31 Aug 2023
Viewed by 778
Abstract
The rate of the removal of materials coated with nano−crystalline diamonds by femtosecond laser etching was examined by adjusting the repetition rate of the femtosecond laser, the energy−flux density of the concentrated spot, and the scanning speed. The observational results of the white-light [...] Read more.
The rate of the removal of materials coated with nano−crystalline diamonds by femtosecond laser etching was examined by adjusting the repetition rate of the femtosecond laser, the energy−flux density of the concentrated spot, and the scanning speed. The observational results of the white-light interferometer and the numerical fitting approach were used to develop the removal rate function model of the nano-crystalline diamond-covered material etched by the femtosecond laser. The findings demonstrated that the rate of material removal was not greatly affected by the repetition frequency and that the amount of laser energy accumulated over time on the coated surface is steady. The processing outcomes under different laser scanning speeds are different, and the material removal rate tends to increase and then decrease with an increase in scanning speed. The greater the energy−flux density of the focused spot, the greater the etching intensity, and the greater the material removal rate. With an increase in scanning speed, the rate at which the material is removed often rises initially before falling. Full article
(This article belongs to the Special Issue Advances in Surface Characterisation and Surface Modification of the Materials)
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12 pages, 2208 KiB  
Article
An Evaluation of Surface-Active Agent Hexadecyltrimethylammonium Bromide with Vertical Self-Alignment Properties to Align Liquid Crystals for Various Cell Gap Conditions
by Jun-Seok Ma, Jin-Young Choi, Hyun-Ji Shin, Jae-Hwan Lee, Seung-Won Oh and Wook-Sung Kim
Appl. Sci. 2022, 12(24), 12582; https://doi.org/10.3390/app122412582 - 8 Dec 2022
Cited by 3 | Viewed by 1457
Abstract
We evaluated hexadecyltrimethylammonium bromide (HTAB) for liquid crystals (LCs) in layered ITO cells with various cell gap conditions. HTAB is a surfactant that can self-align vertically on the surface of indium tin oxide (ITO) substrates and induce homeotropic alignment of the LC molecules. [...] Read more.
We evaluated hexadecyltrimethylammonium bromide (HTAB) for liquid crystals (LCs) in layered ITO cells with various cell gap conditions. HTAB is a surfactant that can self-align vertically on the surface of indium tin oxide (ITO) substrates and induce homeotropic alignment of the LC molecules. For implementing RF devices with HTAB and LCs, we should consider limitations caused by the design conditions which are different from conventional liquid crystal displays such as cell gap. We quantified the concentration of HTAB ([HTAB]) that is necessary to form and maintain a sufficiently dense vertical alignment of 5CB (4-Cyano-4′-pentylbiphenyl). The required [HTAB] for full-homeotropic alignment was increased to the cell gap until it was too large to support the transfer of the surface alignment to the LC molecules, due to the weak anchoring nature of HTAB. We also showed the phase-change characteristic of the LC mixture related to [HTAB] for the design of RF devices driven by light or heat. This study may help to guide the development of new approaches to designing efficient RF devices that use LCs. Full article
(This article belongs to the Special Issue Advances in Surface Characterisation and Surface Modification of the Materials)
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