Characterization of protective layers produced by laser treatment

2012 ◽  
Author(s):  
Václav Ocelík ◽  
Ismail Hemmati ◽  
Jeff Th.M. De Hosson
Keyword(s):  
Laser Treatment ◽  
Protective Layers

Photothermal characterization of protective layers and surface modifications

2000 ◽  
Vol 31 (9) ◽  
pp. 850-855 ◽  
Author(s):  
I. Delgadillo-Holtfort ◽  
J. Gibkes ◽  
D. Dietzel ◽  
M. Kaack ◽  
B. K. Bein ◽  
...  
Keyword(s):  
Surface Modifications ◽  
Protective Layers

Preparation and Characterization of the Amidoxime-Modified Polyacrylonitrile (PAN-Amidoxime) Nanofibre Composite

2014 ◽  
Vol 633-634 ◽  
pp. 30-33 ◽  
Author(s):  
Min Hu ◽  
Yu Hao Ma ◽  
Zong Jie Li ◽  
Wei Min Kang ◽  
Bo Wen Cheng
Keyword(s):  
Ir Spectra ◽  
Protective Layers ◽  
Ultrasonic Bonding ◽  
Ft Ir ◽  
Bonding Method ◽  
Amidoxime Group

In this research, a kind of nonwoven composite used for the absorption of heavy mental ions has been made. The composite was made of two layers of ES thermal bonded nonwovens as the protective layers and the PAN-amidoxime nanofibers which are prepared through the modification of electrospun PAN nanofibers as the interlayer. The composition was achieved by the ultrasonic bonding method. After the composition the PAN nanofibers were modified by grafting the amidoxime group to PAN. The results of FT-IR spectra and FE-SEM indicated that nitrile groups in PAN were partly converted into amidoxime groups and there were no serious cracks on the surface of PAN-amidoxime nanofibers. The results show that the amidoxime groups have been proved to be grafted to the PAN nanofibers with the percent grafting of 81.6%.

Pulsed-PTA Preparation of B4C-Based Titanium Matrix Cermet

2021 ◽  
Author(s):  
Pavel Rohan ◽  
Marie Kolaříková ◽  
Stanislav Krum ◽  
Zdeněk Hazdra ◽  
Josef Šepitka ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Titanium Alloys ◽  
Industrial Applications ◽  
Pulsed Plasma ◽  
Titanium Matrix ◽  
Protective Layers ◽  
The Matrix ◽  
Melting Pool ◽  
B4c Powder

Abstract Pulsed plasma transferred arc surfacing is presently used in many industrial applications to make protective layers against corrosion, temperature exposition, and excessive wear. Increasing wear resistance is especially important in areas of industry where titanium alloys are used, such as aviation and cosmonautics, because the wear resistance of titanium alloys is often weak. One way to increase the wear resistance is to deposit or form a cermet with a titanium matrix (TMC) on the surface of the part. The present study deals with the fabrication and characterization of TMC based on B4C. TMC with B4C was formed by cofeeding Ti6Al4V and B4C powder into a melting pool. It has been found that the deposited, relatively thick layers have homogeneously dispersed B4C grains in the matrix. The deposits are metallurgically connected to the substrate - Ti6Al4V. The TMCs were investigated in terms of microstructure and chemical composition. Wear resistance was determined using the linear pin test.

Quantitative Analysis of Raman Spectra from Diamond Like Carbon: Calibration Transfer

1998 ◽  
Vol 555 ◽  
Author(s):  
S. S. Rosenblum ◽  
Kevin L. Davis ◽  
James M. Tedesco
Keyword(s):  
Raman Spectroscopy ◽  
Hard Disk Drives ◽  
Diamond Like Carbon ◽  
Disk Drives ◽  
Calibration Transfer ◽  
Carbon Coatings ◽  
Protective Layers ◽  
Non Destructive

AbstractWe report on Raman studies of diamond-like carbon (DLC) films; in particular, we report on the instrumentation and methodology required for comparing Raman measurements taken on different Raman analyzers. Raman spectroscopy has taken on an increasingly important role in materials processing because of its capability of performing non-destructive, in situ characterization of thin films. In particular, noncrystalline carbon coatings have become ubiquitous as protective layers on everything from machine tools to hard disk drives. As tolerances on coating properties begin to play an important part in determining device failure, Raman spectroscopy has found ever greater application as a quality control/quality assurance tool. However, use of Raman as an analytical tool has been hampered by the inability to quantitatively compare spectra obtained with different Raman analyzers. By using automated, robust calibration protocols on both the wavelength and intensity axes, we have demonstrated cross-instrument calibration transfer of DLC films.

Interfacial characterization of Er:Yagsuper-short-pulse laser treatment on dentin

2015 ◽  
Vol 31 ◽  
pp. e60
Author(s):  
C.S. Azevedo ◽  
M.R.L. Simionato ◽  
A.B. Matos
Keyword(s):  
Laser Treatment ◽  
Pulse Laser ◽  
Short Pulse ◽  
Short Pulse Laser
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