scholarly journals Effect of Yttrium and Rhenium Ion Implantation on the Performance of Nitride Ceramic Cutting Tools

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4687
Author(s):  
Dmitrij Morozow ◽  
Zbigniew Siemiątkowski ◽  
Edwin Gevorkyan ◽  
Mirosław Rucki ◽  
Jonas Matijošius ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Cutting Forces ◽  
Cutting Tools ◽  
Metal Vapor ◽  
Vacuum Arc ◽  
Experimental Investigations ◽  
Unexpected Result ◽  
Turning Process ◽  
Machining Performance ◽  
Tool Surface

In the paper, the results of experimental investigations of ion implanted cutting tools performance are presented. The tools, made out of Si3N4 with additives typically used for turning of Ti-6Al-4V alloy, underwent implantation with ions of yttrium (Y+) and rhenium (Re+) using the metal vapor vacuum arc method. Distribution of ions on the tool surface was measured. The cutting tools were tested in turning process with measurement of cutting forces and analysis of wear. A rather unexpected result was the increased wear of the tool after Y+ implantation with 1 × 1017 ion/cm2. It was demonstrated, however, that the tool after Y+ 2 × 1017 ion/cm2 ion implantation provided the best machining performance.

scholarly journals Formation of Buried Epitaxial Si-Ge Alloy Layers in Si Crystal by High Dose Ge ION Implantation

1991 ◽  
Vol 235 ◽  
Author(s):  
Kin Man Yu ◽  
Ian G. Brown ◽  
Seongil Im
Keyword(s):  
Ion Implantation ◽  
Single Crystal ◽  
Lattice Mismatch ◽  
Solid Phase ◽  
Metal Vapor ◽  
Ion Source ◽  
Vacuum Arc ◽  
High Dose ◽  
Solid Phase Epitaxy ◽  
Ion Channeling

ABSTRACTWe have synthesized single crystal Si1−xGex alloy layers in Si <100> crystals by high dose Ge ion implantation and solid phase epitaxy. The implantation was performed using the metal vapor vacuum arc (Mevva) ion source. Ge ions at mean energies of 70 and 100 keV and with doses ranging from 1×1016 to to 7×1016 ions/cm2 were implanted into Si <100> crystals at room temperature, resulting in the formation of Si1−xGex alloy layers with peak Ge concentrations of 4 to 13 atomic %. Epitaxial regrowth of the amorphous layers was initiated by thermal annealing at temperatures higher than 500°C. The solid phase epitaxy process, the crystal quality, microstructures, interface morphology and defect structures were characterized by ion channeling and transmission electron microscopy. Compositionally graded single crystal Si1−xGex layers with full width at half maximum ∼100nm were formed under a ∼30nm Si layer after annealing at 600°C for 15 min. A high density of defects was found in the layers as well as in the substrate Si just below the original amorphous/crystalline interface. The concentration of these defects was significantly reduced after annealing at 900°C. The kinetics of the regrowth process, the crystalline quality of the alloy layers, the annealing characteristics of the defects, and the strains due to the lattice mismatch between the alloy and the substrate are discussed.

Mechanics and Dynamics of Hard Turning Process

2004 ◽  
Author(s):  
Kivilcim Buyukhatipoglu ◽  
Ismail Lazoglu ◽  
Hubert Kratz ◽  
Fritz Klocke
Keyword(s):  
Cutting Forces ◽  
Hard Turning ◽  
Prediction Models ◽  
Orthogonal Cutting ◽  
Cutting Tools ◽  
Temperature Fields ◽  
Turning Process ◽  
Cycle Times ◽  
High Productivity ◽  
Recent Developments

In precision machining, due to the recent developments on the cutting tools, machine tool structural rigidity and improved CNC controllers, hard turning is an emerging process as an alternative to some of the grinding processes by providing reductions in costs and cycle-times. In industrial environments, hard turning is established for geometry features of parts with low to medium requirements on part quality. Better and deeper understanding of cutting forces, stresses and temperature fields, temperature gradients created during the machining are very critical for achieving highest quality products and high productivity in feasible cycle times. In order to enlarge the capability profile of the hard turning process, this paper introduces to prediction models of mechanical and thermal loads during turning of 51CrV4 with hardness of 68 HRC by CBN tool. The shear flow stress, shear and friction angles are determined from the orthogonal cutting tests. Cutting force coefficients are determined from orthogonal to oblique transformations. Cutting forces and surface profiles are predicted and compared with experimental measurements.

Corrosion behavior of Zr modified CrN coatings using metal vapor vacuum arc ion implantation

2007 ◽  
Vol 25 (1) ◽  
pp. 110-116 ◽  
Author(s):  
K. P. Purushotham ◽  
L. P. Ward ◽  
N. Brack ◽  
P. J. Pigram ◽  
P. Evans ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Corrosion Behavior ◽  
Metal Vapor ◽  
Vacuum Arc ◽  
Crn Coatings

Pattern Evolution of NiSi2 on Si Surface upon High Current Pulsed Ni Ion Implantation

2000 ◽  
Vol 648 ◽  
Author(s):  
X.Q. Cheng ◽  
H.N. Zhu ◽  
B.X. Liu
Keyword(s):  
Ion Implantation ◽  
Ion Beam ◽  
Fractal Dimensions ◽  
Metal Vapor ◽  
Ion Source ◽  
Vacuum Arc ◽  
High Current ◽  
Si Substrate ◽  
Kinetics Of ◽  
Si Wafer

AbstractFractal pattern evolution of NiSi2 grains on a Si surface was induced by high current pulsed Ni ion implantation into Si wafer using metal vapor vacuum arc ion source. The fractal dimension of the patterns was found to correlate with the temperature rise of the Si substrate caused by the implanting Ni ion beam. With increasing of the substrate temperature, the fractal dimensions were determined to increase from less than 1.64, to beyond the percolation threshold of 1.88, and eventually up to 2.0, corresponding to a uniform layer with fine NiSi2 grains. The growth kinetics of the observed surface fractals was also discussed in terms of a special launching mechanism of the pulsed Ni ion beam into the Si substrate.

Formation of copper silicides by high dose metal vapor vacuum arc ion implantation

2003 ◽  
Vol 220 (1-4) ◽  
pp. 40-45 ◽  
Author(s):  
Chun Rong ◽  
Jizhong Zhang ◽  
Wenzhi Li
Keyword(s):  
Ion Implantation ◽  
Metal Vapor ◽  
Vacuum Arc ◽  
High Dose

A Numerical Study to Investigate the Influence of Edge Preparation in Vibration Assisted Machining

2018 ◽  
Author(s):  
Salman Pervaiz ◽  
Sathish Kannan ◽  
Wael Abdel Samad
Keyword(s):  
Cutting Forces ◽  
Small Amplitude ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Numerical Study ◽  
Cutting Tools ◽  
Cutting Edge ◽  
Internal Stresses ◽  
Machining Performance ◽  
Edge Preparation

In machining operation, cutting tool performs a central role towards the overall machining performance. A user from metal cutting community always look for better cutting tools that can enhance productivity by reducing tool wear and cost. Modification in the micro-geometry of cutting edge is termed as edge preparation, and it is performed to improve the machining performance by strengthening the cutting edge, reducing internal stresses of coating and lowering the edge chipping etc. Edge preparation has a controlling influence on the formation of deformation zones, cutting temperature, cutting forces and stresses at the cutting interface. Vibration assisted machining (VAM) concept is gaining fame in the metal cutting sector community for machining difficult-to-machine materials. In VAM, cutting tool moves with a small amplitude vibration instead of moving with a constant cutting velocity. This small amplitude vibrational movement provides better machining performance for difficult-to-cut brittle materials. The current numerical study utilized different edge prepared micro-geometries such as sharp edge, round edge and chamfer edge etc. cutting tools, and then these cutting tools were used in the numerical simulations of VAM. The study shows higher magnitude of cutting forces under VAM with tools with modified geometry. The study is beneficial for the metal cutting community and opens new areas of industrial applications.

Experimental Investigations to Study the Effect of Solid Lubricant MOS2 on the Performance of Hard Turning

2010 ◽  
Author(s):  
Dilbag Singh ◽  
P. Venkateswara Rao
Keyword(s):  
Surface Finish ◽  
Cutting Forces ◽  
Hard Turning ◽  
Solid Lubricant ◽  
Research Work ◽  
Cryogenic Cooling ◽  
Experimental Investigations ◽  
Cutting Fluids ◽  
Machining Performance ◽  
Molybdenum Disulphide

In hard turning, lot of heat is generated due to plastic deformation of the work material, friction at the tool-chip interface and friction between tool and the workpiece. The heat produced in machining adversely affects the quality of the products produced. Cutting fluids have been the conventional choice to deal with this problem. However, due to the environmental restrictions, the use of cutting fluids is restricted. Machining with solid lubricants, cryogenic cooling by liquid nitrogen and minimum quantity lubrication are some of the alternative approaches in this direction. This research work deals with an investigation on using molybdenum disulphide as solid lubricant in order to reduce friction for improving the machining performance and for overcoming some of the limitations that arise due to the use of cutting fluids or while dry hard turning. An experimental setup has been designed and built, and experiments have been conducted to study the effect of using molybdenum disulphide as solid lubricant on surface finish and cutting forces. An improvement in surface finish was observed with molybdenum disulphide assisted hard turning. It was also observed that there was a considerable reduction of cutting forces, thereby reducing the specific energy needed and consequently improving the machining performance.

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