A5007043249- Advanced machining processes and optimization
- Electronic Packaging and Soldering Technologies
- Advanced Surface Polishing Techniques
- Aluminum Alloys Composites Properties
- Thin-Film Transistor Technologies
- Adhesion, Friction, and Surface Interactions
- Silicon and Solar Cell Technologies
- Tribology and Wear Analysis
- Solar Thermal and Photovoltaic Systems
- Intermetallics and Advanced Alloy Properties
- 3D IC and TSV technologies
- Additive Manufacturing and 3D Printing Technologies
- Additive Manufacturing Materials and Processes
- Solar-Powered Water Purification Methods
- Lubricants and Their Additives
- Metal and Thin Film Mechanics
- Metallurgical and Alloy Processes
- Phase Change Materials Research
- Epoxy Resin Curing Processes
- Metal Alloys Wear and Properties
- Heat Transfer and Optimization
- Tunneling and Rock Mechanics
- Bee Products Chemical Analysis
- Thermal properties of materials
- Advanced materials and composites
University of Minho
2012-2024
This work discusses challenges in conventional grinding wheels: heat-induced tool wear and workpiece thermal damage. While textured abrasive wheels improve heat dissipation, the current surface-only methods, such as those based on laser machining, have high renewal costs. The proposed manufacturing technology introduces an innovative 3D cooling channel structure throughout wheel, enabling various geometries for specific wheel applications. production steps were designed to accommodate...
This study presents a methodology to evaluate the drying mechanism of grinding wheels production, along depth specimen, during thermal cycle. The and moisture gradients specimens were determined. adopted experimental allows obtaining precise contents cross section component. Results showed that two steps are present kinetics is affected by compaction pressure, which in turn alters open porosity level. A critical compression pressure (17–23 MPa) was determined for change on characteristics,...
Abstract The rate of heat transfer to the mold during solidification determines cooling castings, which significantly impacts their characteristics. use an insert produced by additive manufacturing in mold, with appropriately designed channels, enables adequate control entire piece. This article investigates properties at interface between two types steel used for die casting molds (steel A) and additively manufactured inserts B). study analyzed impact coolant water flow channel (215, 300,...
Purpose In a printed circuit board assembly (PCBA), the coefficient of thermal expansion (CTE) mismatch between solder joint materials has detrimental impact on reliability. The mechanical stresses caused by changes lead to fatigue and sometimes failure joints. purpose this study is propose novel pad design obtain an interrupted solder/substrate interface, improve PCBA Design/methodology/approach An interruption in continuous intermetallic compound (IMC) layer was implemented, deposition...
Abstract In recent years, manufacturing technologies have advanced, and producing parts with complex geometries is now possible. For example, a proper cooling system must be designed when casting used in production of geometrically intricate component. An excellent example component to manufactured are the heat sinks electric vehicles. Nevertheless, this area activity optimizing thermal dissipation vital. Reducing mass also crucial for overall vehicle performance. Heat sink geometry key...
A common failure mode of electronic printed circuit boards (PCB’s) is the appearance cold solder joints between component and PCB, during product life. This phenomenon related to joint fatigue attributed mainly mismatch coefficients thermal expansion (CTE) component-solder-PCB assembly. With today’s thickness decreasing increasing working temperatures, among others, stresses strains due temperature changes are growing, leading limited life products. As decreases with plastic strain, creep...
Abstract During the life cycle of an electronic printed circuit boards (PCBs), cold solder joints formation between component and PCB are a failure mode that happen commonly. This phenomenon is related to joint fatigue attributed mainly mismatch coefficients thermal expansion (CTE) component-solder-PCB assembly. With today’s thickness decreasing increasing working temperatures, among others, stresses strains due temperature changes growing, leading limited products. In this way, once as...
first_page settings Order Article Reprints Font Type: Arial Georgia Verdana Size: Aa Line Spacing: Column Width: Background: Open AccessAbstract Dimensional Variations in Drying of Composite Components for Abrasive Wheels † by Sharlane Maria da Costa 1,2,*, Paulina Capela 1,2, Mário Pereira 3, João Ribeiro 4 and Delfim Soares 1,2 1 CMEMS Center Microelectromechanical Systems, University Minho, 4800-058 Guimarães, Portugal 2 LABBELS–Associate Laboratory, 4710-057 Braga, 3 CF-UM-UP, Centro...
The focus of this research is on thermal contact resistance between a mold and its insert, specifically inserts made by additive manufacturing (AM). Using steady-state system varying pressures (0, 50, 75, 100 bars), we present experimental results the at interface steel A (1.2344), obtained from an extruded rod, B (1.2709), produced laser powder bed fusion. Thermal tests were performed for unbonded bonded configurations. Results showed that increasing pressure allows equilibrium to be...
Abstract Most electronic failures that occur in equipment are due to stresses induced by differences the Coefficient of Thermal Expansion (CTE) different materials a Printed Circuit Board Assemblies (PCBA). During thermal cycle, incompatibility CTE between PCB and components induces shear fatigue may affect reliability solder interconnections on PCB, which can eventually lead fracture failure joints PCB. Due advancement industry, interest from researcher’s point view has grown studying...
Abstract Grinding wheels are used in manufacturing industry to shape and finish different types of materials. To achieve this purpose, the wear resistance grinding materials capacity promote on opposing surface determine performance part. During operations high temperatures developed wheel/piece contact which can cause several problems like working material microstructural changes, internal defects (fissures...). In last years, superficial structured have been order reduce temperature...