Andrew A. Wereszczak
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View article: Vitreous silica formation within shear bands in a dynamically compacted granular crystalline α‐quartz
Vitreous silica formation within shear bands in a dynamically compacted granular crystalline α‐quartz Open
A shear band is a heterogeneous, narrow seam within a solid material whose formation is caused by intense localized shearing when a sufficiently large amount of deformation occurs. If that deformation occurs at a sufficiently rapid rate, w…
View article: Apparent fracture toughness estimation of additively manufactured alumina from as‐printed chevron‐notched test specimens
Apparent fracture toughness estimation of additively manufactured alumina from as‐printed chevron‐notched test specimens Open
Ceramic vat photopolymerization (VPP) is a digital light processing method used to make additively manufactured green ceramic components that are then sintered. Despite the ever‐advancing maturation of this method's green‐state process, so…
View article: Spherical Indentation and Implementation of S3/P for yield stress determination of brittle materials
Spherical Indentation and Implementation of S3/P for yield stress determination of brittle materials Open
View article: Issue Information
Issue Information Open
Wiley's Corporate Citizenship initiative seeks to address the environmental, social, economic, and ethical challenges faced in our business and which are important to our diverse stakeholder groups.Since launching the initiative, we have f…
View article: Sintered silver joints via controlled topography of electronic packaging subcomponents
Sintered silver joints via controlled topography of electronic packaging subcomponents Open
Disclosed are sintered silver bonded electronic package subcomponents and methods for making the same. Embodiments of the sintered silver bonded EPSs include topography modification of one or more metal surfaces of semiconductor devices bo…
View article: Direct cooled power electronics substrate
Direct cooled power electronics substrate Open
The disclosure describes directly cooling a three-dimensional, direct metallization (DM) layer in a power electronics device. To enable sufficient cooling, coolant flow channels are formed within the ceramic substrate. The direct metalliza…
View article: Glass strengthening and patterning methods
Glass strengthening and patterning methods Open
High intensity plasma-arc heat sources, such as a plasma-arc lamp, are used to irradiate glass, glass ceramics and/or ceramic materials to strengthen the glass. The same high intensity plasma-arc heat source may also be used to form a perm…
View article: Understanding the effect of specimen size on the properties of fine-grain isotropic nuclear graphite for irradiation studies: Mechanical properties
Understanding the effect of specimen size on the properties of fine-grain isotropic nuclear graphite for irradiation studies: Mechanical properties Open
View article: Issue Information
Issue Information Open
Wiley's Corporate Citizenship initiative seeks to address the environmental, social, economic, and ethical challenges faced in our business and which are important to our diverse stakeholder groups.Since launching the initiative, we have f…
View article: Uranium Nitride as LWR TRISO Fuel: Thermodynamic Modeling of U-C-N and Thermomechanics
Uranium Nitride as LWR TRISO Fuel: Thermodynamic Modeling of U-C-N and Thermomechanics Open
A new concept for light water reactor (LWR) nuclear fuel has recently been proposed that utilizes pellets of tristructural isotropic (TRISO) fuel particles embedded in a SiC or zirconium alloy matrix, replacing sintered urania pellets. The…
View article: Rotational flexural strength of cylindrical brittle specimens
Rotational flexural strength of cylindrical brittle specimens Open
Conventional static flexural strength testing of brittle cylindrical rods only subjects a small fraction of the entire specimen's area or volume to the maximum tensile stress. Thus, a nonconservative measured strength likely results since …
View article: Highly Integrated WBG Power Module for Next Generation Plug-In Vehicles
Highly Integrated WBG Power Module for Next Generation Plug-In Vehicles Open
Current inverter technologies used in electric vehicles (EVs) are bulky, heavy, and expensive. The performance of the inverter is also limited by the traditional Si-based semiconductor and packaging technology. These constraints are respon…
View article: Effect of aqueous‐based mechanical polishing on the nanoindentation response of borosilicate glasses
Effect of aqueous‐based mechanical polishing on the nanoindentation response of borosilicate glasses Open
When attempting to measure material properties by sampling near‐surface volumes with techniques like nanoindentation, careful consideration of the state of the surface compared to the bulk is paramount for valid characterization. The proce…
View article: Issue Information
Issue Information Open
Cover Photograph: Geometrical tolerance of extruded glass tubes is an important parameter for applications such as mass spectrometry.Glass flow effects during extrusion such as die swell and tapering can affect the tolerances along the len…
View article: Glass Striae and Laser Shock Damage
Glass Striae and Laser Shock Damage Open
This study sought to examine if striae are preferential locations for damage initiation in vitreous silicate float glasses when they are subjected to shock. Striae are typically native to vitreous silicate float glasses and their formation…
View article: High-Pressure Mechanical Response of Two Vitreous Silicates
High-Pressure Mechanical Response of Two Vitreous Silicates Open
The improved understanding of the high-pressure response of vitreous silicates is relevant to sought-after improvements of transparent protective systems. In this study, the quasi-static high-pressure (> 1 GPa) mechanical responses of BORO…
View article: Failure stress comparison of different pairings of Ag-plating and reflow-oven-processed pressureless-sintered-Ag interconnects
Failure stress comparison of different pairings of Ag-plating and reflow-oven-processed pressureless-sintered-Ag interconnects Open
View article: Double-Sided Pressureless-Sintered-Silver Interconnects Fabricated by Reflow-Oven-Processing
Double-Sided Pressureless-Sintered-Silver Interconnects Fabricated by Reflow-Oven-Processing Open
A significant amount of development with sintered-silver as an alternative interconnect (or attachment or attach) material in power electronic devices has occurred since ~ 2010 at Oak Ridge National Laboratory's National Transportation Res…
View article: Report on the ASME design code development effort for Composite Core Components for High Temperature Reactors
Report on the ASME design code development effort for Composite Core Components for High Temperature Reactors Open
This report summarizes the activities and status of the ASME design code development effort for Composite Core Components for High Temperature Reactors during Fiscal Year 2018. The subsection drafts develop for ASME BPVC Division 5 Section…
View article: Threshold angle and valid fracture of the sectored flexural specimen
Threshold angle and valid fracture of the sectored flexural specimen Open
The sectored flexural specimen was developed over a decade ago to measure the strength of ceramic and glass tubes and cylinders in which flaws on a tube's or cylinder's outer surface are limiters of axial tensile failure stress. Using the …
View article: Apparent Fracture Toughness of Pressureless Sintered Silver Interconnects
Apparent Fracture Toughness of Pressureless Sintered Silver Interconnects Open
This study uses three-point flexural testing to estimate the room-temperature apparent fracture toughness (K Ic_app) of a pressureless sintered-silver interconnect - a candidate material for use in power electronic devi…
View article: Reflow-oven-processing of pressureless sintered-silver interconnects
Reflow-oven-processing of pressureless sintered-silver interconnects Open
View article: Cantilever testing of sintered-silver interconnects
Cantilever testing of sintered-silver interconnects Open
View article: Anisotropic Thermal Response of Packed Copper Wire
Anisotropic Thermal Response of Packed Copper Wire Open
The apparent thermal conductivity of packed copper wire test specimens was measured parallel and perpendicular to the axis of the wire using laser flash, transient plane source, and transmittance test methods. Approximately 50% wire packin…
View article: White-beam X-ray diffraction and radiography studies on high-boron-containing borosilicate glass at high pressures
White-beam X-ray diffraction and radiography studies on high-boron-containing borosilicate glass at high pressures Open
Multi-angle energy-dispersive X-ray diffraction studies and white-beam X-ray radiography were conducted with a cylindrically shaped (1 mm diameter and 0.7 mm high) high-boron-content borosilicate glass sample (17.6% B2O3
View article: Adaptation of the chevron‐notch beam fracture toughness method to specimens harvested from diesel particulate filters
Adaptation of the chevron‐notch beam fracture toughness method to specimens harvested from diesel particulate filters Open
The apparent fracture toughness of a porous cordierite ceramic was estimated using a large specimen whose geometry was inspired by the ASTM ‐C1421‐standardized chevron‐notch beam. Using the same combination of experiment and analysis used …
View article: Issue Information ‐ TOC
Issue Information ‐ TOC Open
Optical fi ber has a long and rich history.Even before the electromagnetic wave equation was revealed by Maxwell in 1865, Tyndall -building on the efforts of Colladon and Babinet -popularized total internal refl ection to a broad audience,…
View article: Evaluation of Fuel-Borne Sodium Effects on a DOC-DPF-SCR Heavy-Duty Engine Emission Control System: Simulation of Full-Useful Life
Evaluation of Fuel-Borne Sodium Effects on a DOC-DPF-SCR Heavy-Duty Engine Emission Control System: Simulation of Full-Useful Life Open
For renewable fuels to displace petroleum, they must be compatible with emissions control devices. Pure biodiesel contains up to 5 ppm Na + K and 5 ppm Ca + Mg metals, which have the potential to degrade diesel emissions control systems. T…
View article: Sub-micron fracture mechanism in silica-based glasses activated by permanent densification from high-strain loading
Sub-micron fracture mechanism in silica-based glasses activated by permanent densification from high-strain loading Open
View article: Method to Determine Maximum Allowable Sinterable Silver Interconnect Size
Method to Determine Maximum Allowable Sinterable Silver Interconnect Size Open
The use of sintered-silver for large-area interconnection is attractive for some large-area bonding applications in power electronics such as the bonding of metal-clad, electrically-insulating substrates to heat sinks. Arrays of different …