scholarly journals Formation of Silicon Carbide in the Surface Layer of Metals by Dual High Energy Ion Implantation

1999 ◽  
Vol 40 (5) ◽  
pp. 428-430 ◽  
Author(s):  
Syouhei Taniguchi ◽  
Akiharu Kitahara ◽  
Shuichi Wakayama
Keyword(s):  
Silicon Carbide ◽  
Surface Layer ◽  
Ion Implantation ◽  
High Energy

Damage in High Energy Light Ions Irradiated Silicon Carbide

1998 ◽  
Vol 510 ◽  
Author(s):  
P. Leveque ◽  
S. Godey ◽  
P.O. Renault ◽  
E. Ntsoenzok ◽  
J.F. Barbot
Keyword(s):  
Silicon Carbide ◽  
Surface Layer ◽  
Energy Transfer ◽  
High Energy ◽  
Alpha Particles ◽  
Defect Production ◽  
Majority Carrier ◽  
Reflectivity Spectra ◽  
Light Ions ◽  
Compensation Layer

AbstractCommercial n-type 4H-SiC wafers were implanted with doses of MeV alpha particles, high enough to cause majority carrier modification. Analysis of infrared reflectivity spectra shows that the implanted crystals can be divided into three layers: a surface layer of about 30 nm followed by a compensation layer where the energy transfer of the incident particles is low and an overdoping layer in the region of maximum defect production, i.e. near the theoretical mean range of ions Rp

scholarly journals Microstructural Features and Surface Hardening of Ultrafine-Grained Ti-6Al-4V Alloy through Plasma Electrolytic Polishing and Nitrogen Ion Implantation

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 696
Author(s):  
Marina K. Smyslova ◽  
Roman R. Valiev ◽  
Anatoliy M. Smyslov ◽  
Iuliia M. Modina ◽  
Vil D. Sitdikov ◽  
...  
Keyword(s):  
Surface Layer ◽  
Ion Implantation ◽  
Surface Hardening ◽  
High Energy ◽  
Coarse Grained ◽  
Α Phase ◽  
Electrolytic Polishing ◽  
Ultrafine Grained ◽  
Phase Size ◽  
Plasma Electrolytic

This work studies a near-surface layer microstructure in Ti-6Al-4V alloy samples subjected to plasma electrolytic polishing (PEP) and subsequent high-energy ion implantation with nitrogen (II). Samples with a conventional coarse-grained (CG) structure with an average α-phase size of 8 μm and an ultrafine-grained (UFG) structure (α-phase size up to 0.35 μm) produced by equal channel angular pressing were used in the studies. Features of phase composition and substructure in the thin surface layers are shown after sequential processing by PEP and II of both substrates with CG and UFG structures. Irrespective of a substrate structure, the so-called “long-range effect” was observed, which manifested itself in enhanced microhardness to a depth of surface layer up to 40 μm, exceeding the penetration distance of an implanted ion he. The effect of a UFG structure on depth and degree of surface hardening after PEP and ion-implantation is discussed.

Formation of silicon carbide and diamond nanoparticles in the surface layer of a silicon target during short-pulse carbon ion implantation

2009 ◽  
Vol 54 (4) ◽  
pp. 600-602 ◽  
Author(s):  
G. E. Remnev ◽  
Yu. F. Ivanov ◽  
E. P. Naiden ◽  
M. S. Saltymakov ◽  
A. V. Stepanov ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Surface Layer ◽  
Ion Implantation ◽  
Short Pulse ◽  
Carbon Ion ◽  
Diamond Nanoparticles ◽  
Silicon Target

Long Period Gratings in Multimode Fiber Fabricated with High-Energy Ion Implantation

2003 ◽  
Vol 22 (4) ◽  
pp. 225-237
Author(s):  
K. J. GRANT ◽  
ROBERTS A. ◽  
D. N. JAMIESON ◽  
B. ROUT ◽  
C. CHER
Keyword(s):  
Ion Implantation ◽  
High Energy ◽  
Multimode Fiber ◽  
Long Period ◽  
Long Period Gratings

Utilisation of High-Energy Heat Sources in Magnesium Alloy Surface Layer Treatment

2013 ◽  
Vol 58 (2) ◽  
pp. 619-624 ◽  
Author(s):  
M. Szafarska ◽  
J. Iwaszko ◽  
K. Kudła ◽  
I. Łegowik
Keyword(s):  
Surface Layer ◽  
Magnesium Alloy ◽  
Physicochemical Properties ◽  
Treatment Effectiveness ◽  
High Energy ◽  
Alloy Surface ◽  
Heat Sources ◽  
X Ray ◽  
Additional Equipment ◽  
Alloy Surface Layer

The main aim of the study was the evaluation of magnesium alloy surface treatment effectiveness using high-energy heat sources, i.e. a Yb-YAG Disk Laser and the GTAW method. The AZ91 and AM60 commercial magnesium alloys were subject to surface layer modification. Because of the physicochemical properties of the materials studied in case of the GTAW method, it was necessary to provide the welding stand with additional equipment. A novel two-torch set with torches operating in tandem was developed within the experiment. The effectiveness of specimen remelting using a laser and the GTAW method was verified based on macro- and microscopic examinations as well as in X-ray phase analysis and hardness measurements. In addition, the remelting parameters were optimised. The proposed treatment methodology enabled the achieving of the intended result and effective modification of a magnesium alloy surface layer.

Silicon carbide formation by methane plasma immersion ion implantation into silicon

2003 ◽  
Vol 21 (4) ◽  
pp. 1375 ◽  
Author(s):  
Zhenghua An ◽  
Ricky K. Y. Fu ◽  
Peng Chen ◽  
Weili Liu ◽  
Paul K. Chu ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Ion Implantation ◽  
Carbide Formation ◽  
Plasma Immersion Ion Implantation

Effects of high-energy (MeV) ion implantation of polyester films

1991 ◽  
Vol 59-60 ◽  
pp. 1263-1266 ◽  
Author(s):  
Ueno Keiji ◽  
Matsumoto Yasuyo ◽  
Nishimiya Nobuyuki ◽  
Noshiro Mitsuru ◽  
Satou Mamoru
Keyword(s):  
Ion Implantation ◽  
High Energy

The Vacancy Generation Influence on the Initial Stage of Ion Implantation

2015 ◽  
Vol 1097 ◽  
pp. 29-34
Author(s):  
E.S. Parfenova ◽  
Anna G. Knyazeva
Keyword(s):  
Surface Layer ◽  
Ion Implantation ◽  
Metal Surface ◽  
Impurity Concentration ◽  
Coupled Model ◽  
Irreversible Processes ◽  
Concentration Profiles ◽  
Thermodynamics Of Irreversible Processes ◽  
Vacancy Generation ◽  
Initial Stage

The coupled model is presented to describe the elements penetration into the surface layer of metal during the process of ion implantation. Mechanical stresses arising due to the interaction of particles with the surface affect the redistribution of the implanted impurity. In addition, the existence of vacancies in the metal surface and their generation under the stresses influence are taken into account. The kinetic law is written on the basis of the thermodynamics of irreversible processes. The solution had been found numerically. As a result, the distributions of impurity concentration and deformations have been obtained for various time moments. The comparison of the concentration profiles with vacancies and without their have been given.

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