Processing of Copper Based Foil Hardened with Zirconia by Non-Deformation Method

Vieira, Luiz Eloi; Bendo, Tatiana; Nieto, Maria Izabel; Klein, Aloı́sio Nelmo; Hotza, Dachamir; Moreno, Rodrigo; Neto, João Batista Rodrigues

doi:10.1590/1980-5373-mr-2016-0574

Cited by 5 publications

(7 citation statements)

References 33 publications

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“…The theoretical resolution of an optical microscope, not taking into account optical aberrations, using white light is about 0.2 microns. However, more realistically, the measurement of film with a thickness of less than one micron is difficult and has a consistent uncertainty [73][74][75][76]. with a Calo tester; r is the radius of the sphere; x is the difference between the radius of the crater and radius of the part of the crater at the bottom of the coating; y is diameter of the crater from which it is subtracted x.…”

Section: Optical Microscopymentioning

confidence: 99%

Measuring the Thickness of Metal Coatings: A Review of the Methods

et al. 2020

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Thickness dramatically affects the functionality of coatings. Accordingly, the techniques in use to determine the thickness are of utmost importance for coatings research and technology. In this review, we analyse some of the most appropriate methods for determining the thickness of metallic coatings. In doing so, we classify the techniques into two categories: (i) destructive and (ii) non-destructive. We report on the peculiarity and accuracy of each of these methods with a focus on the pros and cons. The manuscript also covers practical issues, such as the complexity of the procedure and the time required to obtain results. While the analysis focuses most on metal coatings, many methods are also applicable to films of other materials.

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Section: Optical Microscopymentioning

confidence: 99%

Measuring the Thickness of Metal Coatings: A Review of the Methods

et al. 2020

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“…The theoretical resolution of an optical microscope, not taking into account optical aberrations, using white light, is about 0.2 microns. However, more realistically, the measurement of films with a thickness of less than one micron is difficult and features consistent uncertainty [50][51][52][53].…”

Section: Optical Microscopymentioning

confidence: 99%

Measuring the Thickness of Metal Films: A Selection Guide to the Most Suitable Technique

Giurlani

Berretti

Lavacchi

et al. 2020

2nd Coatings and Interfaces Web Conference (CIWC-2 2020)

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The determination of thickness has a fundamental importance in all fields in which the implementation of films and coatings are required and takes a crucial role in the electroplating sector. The thickness influences many aspects of the coatings such as electrical, mechanical, corrosion protection, and even aesthetic properties. In the multitude of applications of thin layer coatings, the variability of thicknesses and materials is very high, as well as the variability of possible techniques that can be used to determine the characteristics of the layers of interest. The first distinction that can be made between these techniques is that which divides destructive techniques from non-destructive ones, in which, however, the semi- or micro-destructive techniques are immediately difficult to place. Other important parameters to consider are the cost, both for the purchase of the instrumentation and for each single analysis, the difficulties in preparing and measuring the sample, data processing, and obviously the detectable thickness ranges, the possible measurable materials, and precision and accuracy. The purpose of this work is to compare the characteristics of the various investigation methods, with a particular focus on metal film applications, so that it will be easier to choose the most suitable technique for each purpose.

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“…It can be observed from Figs. 13(a-c), that with increasing the applied normal load during wear tests, the abrasive wear rate of pure copper and Cu-ZrO 2 nanocomposite increases 20,21 . Applied load affects the wear rate of compacts significantly and is the most dominating factor controlling the wear behavior.…”

Section: Characterization Of the Sintered Nanocompositesmentioning

confidence: 99%

“…The shortcoming of ex-situ method is that nano-sized oxide dispersoids can be homogeneously dispersed in the copper matrix 20 . Meanwhile, the bonding between the particles and the copper matrix is poor.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the bonding between the particles and the copper matrix is poor. In contrast, dispersion strengthened copper alloys can be produced by various in-situ processing methods with a homogeneous structure, such as internal oxidation, reactive spray deposition and reaction synthesis, etc [20][21][22] . Nowadays, it is well known that by proper reinforcement selection, better properties for MMCs could be produced.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Properties of Cu-ZrO2 Nanocomposites Synthesized by in Situ Processing

2017

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In situ chemical reaction method was used to synthesize Cu-ZrO 2 nanocomposite powders. The process was carried out by addition of NH 4 (OH) to certain amount of dispersed Cu(NO 3 ) 2 ·3H 2 O and ZrOCl 2 ·8H 2 O solution. Afterwards, a thermal treatment at 650 °C for 1 h was conducted to get the powders of CuO and ZrO 2 and remove the remaining liquid. The CuO was then reduced in preferential hydrogen atmosphere into copper. The powders were cold pressed at a pressure of 600 MPa and sintered in a hydrogen atmosphere at 950 °C for 2 h. The structure and characteristics were examined by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The results showed that the nanosized ZrO 2 particles (with a diameter of about 30-50 nm) was successfully formed and dispersed within the copper matrix. The density, electrical conductivity, mechanical strength measurements (compression strength and Vickers microhardness) and wear properties of Cu-ZrO 2 nanocomposite were investigated. Increment in the weight % of ZrO 2 nano-particles up to 10 wt.% in the samples, caused the reduction in the densification (7.2%) and electrical conductivity (53.8%) of the nanocomposites. The highest microhardness (146.5 HV) and compressive strength (474.5 MPa) of the nanocomposites is related to the Cu-10 wt.% ZrO 2 . Owing to the good interfacial bonding between uniformly dispersed ZrO 2 nanoparticles and the copper matrix. The abrasive wear rate of the Cu-ZrO 2 nanocomposite increased with the increasing load or sliding velocity and is always lower than that of copper at any load or any velocity.

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Processing of Copper Based Foil Hardened with Zirconia by Non-Deformation Method

Cited by 5 publications

References 33 publications

Measuring the Thickness of Metal Coatings: A Review of the Methods

Measuring the Thickness of Metal Coatings: A Review of the Methods

Measuring the Thickness of Metal Films: A Selection Guide to the Most Suitable Technique

Microstructure and Properties of Cu-ZrO2 Nanocomposites Synthesized by in Situ Processing

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