Argentophilic pyridinic nitrogen for embedding lithiophilic silver nanoparticles in three-dimensional carbon scaffold for reversible lithium plating/stripping

Reversible lithium metal plating and stripping is required for durable operation of lithium metal batteries. Three-dimensional architecture has been employed for accommodating volume change of lithium metal during repeated plating...

MODELLING OF PERCEPTUAL GLOSS BY PHYSICAL MEASUREMENT OF FLAT SURFACE

While ‘physical gloss’ exists as a physically measurable index, people perceive a ‘perceptual gloss’ as gloss on object surfaces. However, the physical gloss does not always match the perceptual gloss. Thus, we analysed the relationship between physical features and perceptual gloss by measuring the physical properties of object surfaces, including physical gloss. For the experiment, we prepared 127 samples of flat objects that consisted of three materials: paper, resin, and metal plating. Perceptual gloss was visually evaluated using a magnitude estimation method. Plural measurements were conducted to obtain physical features such as gloss unit, haze, distinctness of image (DOI), luminance image features, and transmittance of the samples. Then, we constructed a prediction model of perceptual gloss using these physical features and perceptual gloss through multiple regression analysis. As a result, the prediction accuracy was improved by combining multiple physical quantities with simple regression, using only a gloss unit.

Investigation of the possibility of improving the performance of rolling bearings using metal-coating nanotechnologies

Проведены исследования по повышению износостойкости трущихся деталей подшипника качения за счет использования металлоплакирующих нанотехнологий в процессе обкатки и эксплуатации. Приведены результаты лабораторных триботехнических испытаний подшипниковых материалов в режиме металлоплакирования. Показан механизм образования защитной пленки на стальной поверхности деталей подшипника качения. Экспериментальным путем подтверждена возможность увеличения ресурса подшипников качения в процессе эксплуатации. Studies have been carried out to increase the wear resistance of the friction parts of the rolling bearing due to the use of metal-coating nanotechnologies in the process of running-in and operation. The results of laboratory tribotechnical tests of bearing materials in the metal plating mode are presented. The mechanism of formation of a protective film on the steel surface of rolling bearing parts is shown. The possibility of increasing the service life of rolling bearings during operation has been experimentally confirmed.