Experimental investigation of machining error in elastomer endmilling

This paper deals with fundamental investigation for machining error in elastomer endmilling. In the conventional metal machining, cutting force during endmilling is one of the most important factors to machining error. Because of low-rigidity of elastomers, influence of cutting force may be more important. Therefore, relationship between the cutting force and machining error is investigated. From the experimental results, it becomes clear that cutting forces affect to the machining error only in the down cut machining.特集 : Special Section for the Papers Presented at the Symposium on Mechanical Engineering, Industrial Engineering, and Robotics held at Noboribetsu, Hokkaido, Japan on 11 - 12 January 201

Dielectric Mismatch Mediates Carrier Mobility in Organic-Intercalated Layered TiS₂

The dielectric constant is a key parameter that determines both optical and electronic properties of materials. It is desirable to tune electronic properties though dielectric engineering approach. Here, we present a systematic approach to tune carrier mobilities of hybrid inorganic/organic materials where layered two-dimensional transition-metal dichalcogenide TiS₂ is electrochemically intercalated with polar organic molecules. By manipulating the dielectric mismatch using polar organic molecules with different dielectric constants, ranging from 10 to 41, the electron mobility of the TiS₂ layers was changed three times due to the dielectric screening of the Coulomb-impurity scattering processes. Both the overall thermal conductivity and the lattice thermal conductivity were also found to decrease with an increasing dielectric mismatch. The enhanced electrical mobility along with the decreased thermal conductivity together gave rise to a significantly improved thermoelectric figure of merit of the hybrid inorganic/organic materials at room temperature, which might find applications in wearable electronics