Diamond Tools
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. New concept of tunnel boring machine: high performance using water jet and diamond wire as rock cutting technology
Abstract Tunnel boring machines are important tools in underground infrastructure projects. Although being well established equipment, these machinesare based on designsof more than 60 years ago and are characterized by big dimensions, enormous weight and high power consumption. Commercial aspects should be noted too. The model adopted by the TBM industry re
REM, Int. Eng. J.. Publicado em: 2018-03
-
2. Investigation on the Effect of Different Pre-Cracking Methods on Fracture Toughness of RT-PMMA
Abstract In this study, eight techniques including coping saw, metal slitting saw, razor blade, cubic boron nitride (CBN) disc, scoring, die-cutting and guillotining, diamond disc, and laser cutting methods were used to produce pre-cracked fracture toughness (Kc) test specimens made of poly(methyl methacrylate)/graft-acrylonitrile butadiene styrene blends. T
Lat. Am. j. solids struct.. Publicado em: 2016-11
-
3. Influence of Boriding Process in Adhesion of CVD Diamond Films on Tungsten Carbide Substrates
AbstractThis paper shows successful hindering of the negative effects of the cobalt binder in the process of coating WC-Co cutting tools with CVD diamond films. The strategy was creating a boron-rich layer on the surface of the WC-Co substrates as an interlayer to block Co migration. The traditional boriding technique was improved by preheating the salt powd
Mat. Res.. Publicado em: 2015-10
-
4. Study of the TiC Coating on Powder Metallurgy Diamonds Tool's Performance
Some diamond tools use iron in their composition, and it is known that iron is a strong catalyst for the graphitization of diamonds. This graphitization occurs mainly during the processing of composite materials - conventional sintering or hot pressing, and during cutting operations. This work studies the effect of TiC coating on diamond, on structure, micro
Mat. Res.. Publicado em: 2015-06
-
5. Influence of graphite particles on surface roughness and chip formation studies in turning metal matrix composites
This study presents an experimental investigation on surface roughness and chip formation in turning of Al 2219/15SiCp and Al 2219/15SiCp-3Gr (hybrid) composites. Experiments were conducted with different cutting conditions using carbide, coated carbide and polycrystalline diamond (PCD) tools. The results reveal that the surface roughness values are less for
Mat. Res.. Publicado em: 25/06/2013
-
6. Evaluation of the adhesion strength of diamond films brazed on K-10 type hard metal
The coating of cutting tools with diamond films considerably increases the tool performance due to the combination of the unique tribological properties of diamond with the bulk properties of the substrate (toughness). The tool performance, however, is strongly related to the adhesion strength between the film and the substrate. In this work our main goal wa
Publicado em: 2010
-
7. Potencialidades do uso de ultrassom na determinação do pesticida carbaril empregando eletrodos de diamante
The potentiality of the use of ultrasound radiation in association with a boron-doped diamond electrode was evaluated on the voltammetric determination of the pesticide carbaryl. Improvements in the sensitivity, limit of detection and reproducibility of the measurements were observed due to both, the enhancement of mass transport and the cleaning of the elec
Química Nova. Publicado em: 2010
-
8. "Estudo da influência de instrumentos e técnicas alternativas de preparo cavitário na resistência de união de sistema adesivos à dentina" / Study of the influence of alternative tools and techniques of cavity preparation on teh bond strength of adhesive system to dentin
The current trend toward minimal invasive dentistry has introduced alternative cavity preparation techniques. However, these technologies should not only fulfill the requirements of a conservative philosophy, but also prepare the cavity walls for the subsequent bonding restoration. The purpose of this study was to assess the null hypotheses that: (1) both co
Publicado em: 2007
-
9. Micromachinability study of Ti (CP) and Ti-6Al-4V alloy by means of single point diamond turning / Estudo da microusinabilidade do Ti (CP) e da liga Ti-6Al-4V no torneamento com ferramenta de diamante
Among the various applications where titanium and its alloys are employed, the aeronautic industry is one of the most important, because of their excellent properties such as fracture strength, corrosion resistance and high strength to weight ratio, which is maintained at high temperatures. However, the machinability of titanium and its alloys is generally c
Publicado em: 2005
-
10. Competitive intelligence applied to silicon carbide technologies to abrasive area. / Inteligência competitiva a tecnologias do carbeto de silício para o setor de abrasivos.
Because the fact we dont have studies about Silicon Carbide ( SiC ) to abrasives in Brasil, this study sought to accomplish the SiC technological search in abrasives using Competitive Intelligence. The necessity to know the SiC application trends and threat in bonded abrasives in Brasil It was the decision detanier necessity showed by focal company. In addit
Publicado em: 2005
-
11. Evaluation of the adhesion strength of diamond films brazed on K-10 type hard metal
The coating of cutting tools with diamond films considerably increases the tool performance due to the combination of the unique tribological properties of diamond with the bulk properties of the substrate (toughness). The tool performance, however, is strongly related to the adhesion strength between the film and the substrate. In this work our main goal wa
Materials Research. Publicado em: 2004-06
-
12. Investigation on diamond turning of silicon crystal - generation mechanism of surface cut with worn tool
This paper discusses the effect of tool wear on surface finish in single-point diamond turning of single crystal silicon. The morphology and topography of the machined surface clearly show the type of cutting edge wear reproduced onto the cutting grooves. Scanning electron microscopy is used in order to correlate the cutting edge damage and microtopography f
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001