Results 101 to 110 of about 1,507,269 (398)
Spectral Tuning of Hyperbolic Shear Polaritons in Monoclinic Gallium Oxide via Isotopic Substitution
Advanced Materials, EarlyView.Spectral tuning of highly directional hyperbolic shear polaritons is realized via isotopic substitution of 16O to 18O in monoclinic β$\beta$‐phase gallium oxide. A red‐shift of almost 40 cm−1 is experimentally demonstrated with near‐field imaging, corroborated by the permittivity change extracted from far‐field experiments and density functional theory.
Giulia Carini +28 more
wiley +1 more source
Dynamic stiffness and vibration analysis model of angular contact ball bearing considering vibration and friction state variation [PDF]
, 2022 Xianghe Yun +3 more
openalex +1 more source
Development of new materials for turbopump bearings [PDF]
The life requirement for the angular contact ball bearings in the Space Shuttle Main Engine (SSME) high pressure oxygen turbopump (HPOTP) is 7.5 hours. In actual operation, significantly shorter service life was experienced.
Maurer, R. E., Pallini, R. A.
core +1 more source
The use of perfluoroether lubricants in unprotected space environments [PDF]
, 1985 A series of ball bearing tests in simulated space environment are described which determine durability of perfluoroether lubricants. The results of the examination of the test bearings for each stage are described and experimental techniques designed to ...
Baxter, B. H., Hall, B. P.
core +1 more source
Friction in metal-on-metal total disc arthroplasty: effect of ball radius [PDF]
, 2012 Total Disc Arthroplasty (TDA) can be used to replace a degenerated intervertebral disc in the spine. There are different designs of prosthetic discs, but one of the most common is a ball-and-socket combination.
Hukins, DWL +3 more
core +1 more source
Electrically Tunable Friction: From Sticky to Slippery with Ionic Hydrogels
Advanced Materials, EarlyView.This work demonstrates electrically tunable friction “from sticky to slippery” using ionic hydrogels, achieving reversible more‐than‐fifty‐fold modulation without liquid lubricants. An electric field extracts a salt‐rich interfacial layer that dramatically reduces friction.
Chenxu Liu +9 more
wiley +1 more source
The effect of material defect orientation on rolling contact fatigue of a ball bearing. [PDF]
Sci Rep, 2023 Ghazanfari Holagh A, Alizadeh Kaklar J.
europepmc +1 more source
First order ball bearing kinematics [PDF]
Two first order equations are given connecting geometry and internal motions in an angular contact ball bearing. Total speed, kinematic equivalence, basic speed ratio, and modal speed ratio are defined and discussed; charts are given for the speed ratios
Kingbury, E.
core +1 more source
Advanced Materials Interfaces, EarlyView.It's all in the mix! By employing different homogenization strategies for preparing polystyrene/TiO2 polymer‐ceramic composite (PCC) powders, we tune the morphology of PCC films obtained by powder aerosol deposition, ranging from segregated multilayer‐like to finely blended composites.
Marc C. Thiel +5 more
wiley +1 more source
Jixie chuandong, 2014 The solution of load distribution of rolling element bearing is closely related to the calculation of some key performance indicators,such as load-carrying capacity,lubrication characteristics,fatigue life and so on.In view of dimension deviation of ...
周夕维, 徐华, 熊显智, 王琳
doaj