scholarly journals Plasma nitriding in complex post-processing of stainless steel parts obtained by additive laser technology

2021 ◽  
Vol 2064 (1) ◽  
pp. 012075
Author(s):  
A V Makarov ◽  
V P Kuznetsov ◽  
P A Skorynina ◽  
V A Sirosh ◽  
A B Vladimirov ◽  
...  
Keyword(s):  
Plasma Nitriding ◽  
Film Coating ◽  
Steel Part ◽  
Post Processing ◽  
Maximum Hardness ◽  
Laser Melting ◽  
Thin Film Coating ◽  
Laser Technology ◽  
Ion Plasma ◽  
Diamond Indenter

Abstract Considered are the prospects of applying complex post-processing for an additive manufactured product with the deposition of a multilayer composite coating [Ti0.2C0.8/a-C]40 at the final stage. It is shown that heat treatment, finish milling, ion-plasma nitriding and burnishing with a sliding diamond indenter of a PH1 steel part obtained by selective laser melting (SLM) before deposition of a thin-film coating provides the coating with a minimum surface roughness Ra = 82-86 nm and a maximum hardness of 25.2 ± 1.4 GPa with an increase in the microhardness of the entire “coating-substrate” system.

scholarly journals ELASTIC REFLECTION AND SCATTERING OF BOMBARDING ELECTRONS IN THE SURFACE REGION OF THE CRYSTAL

2017 ◽  
Vol 2 (3) ◽  
pp. 118-127
Author(s):  
Федоренко ◽  
Boris Fedorenko
Keyword(s):  
Surface Region ◽  
Film Coating ◽  
Material Surface ◽  
Surface Layers ◽  
Thin Film Coating ◽  
Surface Areas ◽  
Ion Plasma ◽  
Classical Setting ◽  
Elastic Reflection ◽  
Properties Of Materials

The most effective way of modifying the material surface to provide the desired product properties (corrosion, wear, etc.) is a thin-film coating, such as vacuum ion-plasma covering. Coating properties are determined by the properties of the coating and substrate materials (underlayer substrate is the material to be coated). Coatings stability over time is determined, among other factors, by the compatibility of the coating and substrate materials for physical, crystal-chemical, chemical and other properties. In this regard, is necessary to research physical properties of materials, in particular, in the surface areas. In this paper we study the elastic reflection and scattering of bombarding electrons in the surface layers of the crystal in a classical setting.

scholarly journals Oxidation of boron-titanium thin film coating during cyclic tests on thermal shock

2020 ◽  
Vol 1005 ◽  
pp. 012006
Author(s):  
E E Suslov ◽  
A S Larionov ◽  
S B Kislitsin ◽  
I I Chernov ◽  
M S Staltsov ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermal Shock ◽  
Film Coating ◽  
Cyclic Tests ◽  
Thin Film Coating ◽  
Titanium Thin Film

The Wear Features of a Plasma Thin-Film Coating on High-Speed Steel

2020 ◽  
Vol 41 (2) ◽  
pp. 160-168
Author(s):  
I. A. Rastegaev ◽  
I. I. Rastegaeva ◽  
D. L. Merson ◽  
V. A. Korotkov
Keyword(s):  
Thin Film ◽  
High Speed ◽  
High Speed Steel ◽  
Film Coating ◽  
Thin Film Coating

scholarly journals Selective Laser Melting Process of Al–Based Pyramidal Horns for the W-Band: Fabrication and Testing

2021 ◽  
Author(s):  
L. Lamagna ◽  
A. Paiella ◽  
S. Masi ◽  
L. Bottini ◽  
A. Boschetto ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
High Surface ◽  
Melting Process ◽  
Horn Antenna ◽  
Post Processing ◽  
Laser Melting ◽  
Performance Impact ◽  
Horn Antennas ◽  
Sand Blasting ◽  
W Band

AbstractIn the context of exploring the possibility of using Al-powder Selective Laser Melting to fabricate horn antennas for astronomical applications at millimeter wavelengths, we describe the design, the fabrication, the mechanical characterization, and the electromagnetic performance of additive manufactured horn antennas for the W-band. Our aim, in particular, is to evaluate the performance impact of two basic kinds of surface post-processing (manual grinding and sand-blasting) to deal with the well-known issue of high surface roughness in 3D printed devices. We performed comparative tests of co-polar and cross-polar angular response across the whole W-band, assuming a commercially available rectangular horn antenna as a reference. Based on gain and directivity measurements of the manufactured samples, we find decibel-level detectable deviations from the behavior of the reference horn antenna, and marginal evidence of performance degradation at the top edge of the W-band. We conclude that both kinds of post-processing allow achieving good performance for the W-band, but the higher reliability and uniformity of the sand-blasting post-process encourage exploring similar techniques for further development of aluminum devices at these frequencies.

scholarly journals Multilayer SiC/C Thin Film Coating on Fiber Tip for Raman Probe Application

2021 ◽  
Vol 1892 (1) ◽  
pp. 012016
Author(s):  
Nur Nabilah Samsudin ◽  
Muhammad Firdaus Omar
Keyword(s):  
Thin Film ◽  
Film Coating ◽  
Thin Film Coating ◽  
Raman Probe
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