scholarly journals Study on Platinum Coating Depth in Focused Ion Beam Diamond Cutting Tool Milling and Methods for Removing Platinum Layer

Materials ◽  
2015 ◽  
Vol 8 (9) ◽  
pp. 6498-6507 ◽  
Author(s):  
Woong Choi ◽  
Seung Baek
Keyword(s):  
Focused Ion Beam ◽  
Cutting Tool ◽  
Ion Beam ◽  
Diamond Cutting ◽  
Platinum Coating ◽  
Platinum Layer ◽  
Diamond Cutting Tool

Development and machining performance of a textured diamond cutting tool fabricated with a focused ion beam and heat treatment

2017 ◽  
Vol 47 ◽  
pp. 311-320 ◽  
Author(s):  
Noritaka Kawasegi ◽  
Kazuma Ozaki ◽  
Noboru Morita ◽  
Kazuhito Nishimura ◽  
Makoto Yamaguchi
Keyword(s):  
Heat Treatment ◽  
Focused Ion Beam ◽  
Cutting Tool ◽  
Ion Beam ◽  
Machining Performance ◽  
Diamond Cutting ◽  
Diamond Cutting Tool

0401 Fabrication of a diamond cutting tool utilizing focused ion beam and its cutting properties

2013 ◽  
Vol 2013.50 (0) ◽  
pp. 040101-040102
Author(s):  
Tomoyuki NIWATA ◽  
Noritaka KAWASEGI ◽  
Noboru TAKANO ◽  
Shigeru YAMADA ◽  
Noboru MORITA ◽  
...  
Keyword(s):  
Focused Ion Beam ◽  
Cutting Tool ◽  
Ion Beam ◽  
Diamond Cutting ◽  
Diamond Cutting Tool

Controllability Study of Single-Crystal Diamond Cutting Tool Focus Ion Beam Milling with Different Beam Current and Tilting Angle

2016 ◽  
Vol 1136 ◽  
pp. 430-434 ◽  
Author(s):  
Seung Yub Baek ◽  
Woong Kirl Choi ◽  
Young Jae Choi ◽  
Eun Sang Lee
Keyword(s):  
Cutting Tool ◽  
Ion Beam ◽  
Beam Current ◽  
Diamond Cutting ◽  
Tilting Angle ◽  
Tool Edge ◽  
Single Crystal Diamond ◽  
Processing Procedure ◽  
Edge Sharpness ◽  
Diamond Cutting Tool

Micro/nanoscale diamond cutting tools used in ultra-precision machining can be fabricated by precision grinding, but it is hard to fabricate a tool with a nanometric cutting edge and complex configurations. High-precision geometry accuracy and special shapes for microcutting tools with sharp edges can be achieved by focused ion beam (FIB) milling. However, in the FIB milling process, the surface properties of the substrate (such as a diamond substrate) are affected by the amorphous damage layer caused by the FIB gallium ion collision and implantation and these influence the diamond cutting tool edge sharpness and increase the processing procedure. In this study, to reduce the diamond cutting tool edge sharpness and processing procedure, FIB milling beam current and tilting angle characteristics of single-crystal diamond were investigated, along with method for decreasing the FIB-induced damage on diamond tools by platinum (Pt) coating on the diamond substrate. Experimental results revealed that optimize beam current, tilting angle and platinum (Pt) coating could lead to relatively few processing procedure and sharp cutting tool edge. The obtained results are an endeavor to enhance the controllability of the diamond cutting tool FIB milling.

Microtexture Generation Using Controlled Chatter Machining in Ultraprecision Diamond Turning

2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Syed Adnan Ahmed ◽  
Jeong Hoon Ko ◽  
Sathyan Subbiah ◽  
Swee Hock Yeo
Keyword(s):  
Cutting Tool ◽  
Cutting Speed ◽  
Diamond Turning ◽  
Diamond Cutting ◽  
Machined Surface ◽  
Excited Vibration ◽  
Mass And Heat Transfer ◽  
Tool Shank ◽  
Diamond Cutting Tool

This paper describes a new method of microtexture generation in precision machining through self-excited vibrations of a diamond cutting tool. Conventionally, a cutting tool vibration or chatter is detrimental to the quality of the machined surface. In this study, an attempt is made to use the cutting tool's self-excited vibration during a cutting beneficially to generate microtextures. This approach is named as “controlled chatter machining (CCM).” Modal analysis is first performed to study the dynamic behavior of the cutting tool. Turning processes are then conducted by varying the tool holder length as a means to control vibration. The experimental results indicate that the self-excited diamond cutting tool can generate microtextures of various shapes, which depend on the cutting tool shank, cutting speed, feed, and cutting depth. The potential application of this proposed technique is to create microtextures in microchannels and microcavities to be used in mass and heat transfer applications.

Effect of texture shape on machining performance of textured diamond cutting tool

2019 ◽  
Vol 60 ◽  
pp. 21-27 ◽  
Author(s):  
Noritaka Kawasegi ◽  
Takumi Kawashima ◽  
Noboru Morita ◽  
Kazuhito Nishimura ◽  
Makoto Yamaguchi ◽  
...  
Keyword(s):  
Cutting Tool ◽  
Machining Performance ◽  
Diamond Cutting ◽  
Diamond Cutting Tool

Single Point Diamond Turning of Silicon by Using Micro-Laser Assisted Machining Technique

2014 ◽  
Author(s):  
Hossein Mohammadi ◽  
H. Bogac Poyraz ◽  
Deepak Ravindra ◽  
John A. Patten
Keyword(s):  
Fiber Laser ◽  
Cutting Tool ◽  
Single Point ◽  
Diamond Turning ◽  
Depth Of Cut ◽  
Beam Diameter ◽  
Diamond Cutting ◽  
Laser Assisted Machining ◽  
Diamond Cutting Tool ◽  
Si Wafer

In this study, single point diamond turning (SPDT) is coupled with the micro-laser assisted machining (μ-LAM) technique. The μ-LAM system is used to preferentially heat and thermally soften the work piece material in contact with a diamond cutting tool. In μ-LAM the laser and cutting tool are integrated into a single package, i.e. the laser energy is delivered by a single mode fiber laser to and through a diamond cutting tool. This hybrid method can potentially increase the critical depth of cut (DoC), i.e., a larger ductile-to-brittle transition (DBT) depth, in ductile regime machining, resulting in a higher material removal rate (MRR). An IR continuous wave (CW) fiber laser, wavelength of 1064nm and max power of 100W with a beam diameter of 10μm, is used in this investigation. In the current study SPDT tests were employed on single crystal silicon (Si) wafer which is very brittle and hard to machine by conventional methods. Different outputs such as surface roughness and depth of cut for different set of experiments were analyzed. Results show that an unpolished surface of a Si wafer can be machined in one pass to get a very good surface finish. The Ra was brought down from 1.2μm to 275nm only in one pass which is a very promising result for machining the Si wafer.

Force Analysis, Mechanical Energy and Laser Heating Evaluation of Scratch Tests on Silicon Carbide (4H-SiC) in Micro-Laser Assisted Machining (µ-LAM) Process

2009 ◽  
Author(s):  
Amir R. Shayan ◽  
Huseyin Bogac Poyraz ◽  
Deepak Ravindra ◽  
Muralidhar Ghantasala ◽  
John A. Patten
Keyword(s):  
Laser Beam ◽  
Cutting Forces ◽  
Laser Heating ◽  
Cutting Tool ◽  
Work Piece ◽  
Force Analysis ◽  
Diamond Cutting ◽  
Laser Assisted Machining ◽  
Scratch Tests ◽  
Diamond Cutting Tool

The purpose of applying a laser beam in the micro-laser assisted machining (μ-LAM) process is to preferentially heat and thermally soften the surface layer of the work piece material (4H-SiC) at the interface with a diamond cutting tool. In the μ-LAM process the laser beam (1480 nm and 400 mW) is delivered to the work piece material through a transparent diamond cutting tool. Thus the cutting tool and the laser system are integrated and coupled; in contrast with other LAM processes where the cutting tool and laser are separate and distinct systems. Scratches were made on a 4H-SiC substrate using the μ-LAM process. The characteristics of the scratches, such as depth and width, are principally a function of the cutting tool geometry, applied forces, cutting speed, and laser heating. White light interferometer microscopy and Atomic Force Microscopy (AFM) techniques were used to measure the geometry (depth and width) of the scratches. Force analysis was carried out to evaluate the laser heating effect on the cutting forces and the measured depth of cut. The force analysis included an evaluation of the mechanical work, specific energy, and understanding the effect of laser heating on the cutting process. The scratch tests performed on 4H-SiC with the laser heating showed that there is a greater than 50% reduction in relative calculated hardness values of work piece material, resulting in a significant reduction in cutting forces.

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