18 citations · 102 across the 15 of their papers we have counts for
15 papers
Inhibition of whisker growth by crafting more decomposition-resistant Ti2SnC MAX phase through vanadium solid solution
Haifeng Tang, Xiaodan Yin, Peigen Zhang +6
The exceptional synergy of ceramic and metallic properties within MAX phases positions them as highly promising for a wide array of applications. However, their stability has been…
A High-Temperature Thermocouple Development by Additive Manufacturing: Tungsten-Nickel (W-Ni) and Molybdenum (Mo) Integration with Ceramic Structures
Azizul Islam, Aayush Alok, Vamsi Borra +1
Additive manufacturing holds more potential to enable the development of ceramic-based components. Ceramics offer high resistance to heat, high fracture toughness, and are extremel…
Effect of laser irradiation on the tribological properties of RFsputtered nickel oxide (NiO) thin films
Srikanth Itapu, Vamsi Borra, Frank X. Li +2
The present work aims at investigating the effect of laser irradiation on the tribological properties of RF-sputtered NiO thin films deposited on industrial grade aluminum substrat…
Laser-Based Fabrication of Microstructures on Nickel Thin Films and Its Applications in On-Chip Thin Film Inductors
Srikanth Itapu, Vamsi Borra, Daniel G. Georgiev
This work reports on the fabrication of microbump structures on Ni films by single-pulse, localized laser irradiation. Conditions for the reproducible formation of such microstruct…
Transient Thermal and Electrical Characteristics of a Cylindrical LiFeS2 Cell with Equivalent Circuit Model
Khaled I Alsharif, Alexander H Pesch, Vamsi Borra +4
This study examines the discharge behaviour of a cylindrical LiFeS2 cell to evaluate the parameters that can be used to predict and estimate the nonlinear dynamic response of a bat…
Harmonic content analysis of a soft starting variable frequency motor drive based on FPGA
Yogesh Sapkota, Suman Devkota, Vamsi Borra +3
As the demands for electric vehicles, electric aircrafts, unmanned aircraft systems, and other motor-driven systems increase, high-performance motor drives employing variable frequ…
Metal whisker growth induced by localized, high-intensity DC electric fields
Vamsi Borra, Osama Oudat, Daniel G. Georgiev +2
In this work, a very high, locally applied electric field was used to induce whisker nucleation on an Sn film. The field was generated by using a conductive AFM tip and applying a…
Sn whisker growth mitigation by using NiO sublayers
Vamsi Borra, Srikanth Itapu, Daniel G. Georgiev
The potential of NiO sublayers for whisker growth mitigation has been examined. A thin NiO film was applied on a Cu-coated substrate before the deposition of a thicker Sn layer. Th…
Fabrication of optically smooth Sn thin films
Vamsi Borra, Daniel G. Georgiev, Corey R. Grice
The fabrication of optically smooth thin Sn films by vacuum or electrodeposition techniques is usually challenging. Little has been published on how to address this challenge mainl…
Cultivating Metal Whiskers by Surface Plasmon Polariton Excitation
Vamsi Borra, Daniel G. Georgiev, Victor G. Karpov
This work presents a preliminary experimental study on the possibility to initiate growth of whiskers on the surfaces of some technologically important metals utilizing the enhance…
Modification of Tin (Sn) Metal Surfaces by Surface Plasmon Polariton Excitation
Vamsi Borra, Srikanth Itapu, Victor G. Karpov +1
We report on the modification of tin (Sn) film surfaces under a laser beam irradiation that triggers surface plasmon polariton (SPP) excitations. The observed surface features in t…
Threshold Switching in CdTe Photovoltaics
Suman Devkota, Kwame A Nyako, Brendan Kuzior +5
With the ubiquitous acceptance of PVs, the number of devices manufactured annually is following an exponential trend. Yet, the manufacturing process of important brands of thin fil…
The statistics of tin whisker diameters versus the underlying film grains
O. A. Oudat, Vamsi Borra, Daniel G. Georgiev +1
We compare the statistics of tin whisker diameters to that of the underlying film grains. Both are well approximated by the lognormal distributions. However, the parameters of thos…
Microscopic structure of metal whiskers
Vamsi Borra, Daniel G. Georgiev, V. G. Karpov +1
We present TEM images of the interior of metal whiskers (MW) grown on electroplated Sn films. Along with earlier published information, our observations focus on a number of questi…
Whisker growth on Sn thin film accelerated under gamma-ray irradiation
Morgan Killefer, Vamsi Borra, Ahmed Al-Bayati +4
We report on growth of tin (Sn) metal whiskers that is significantly accelerated under gamma-ray irradiation. The studied Sn thin film, evaporated on glass substrate, was subjected…