The atomic-scale microstructure and electron emission properties of boron and sulfur (denoted as B-S) codoped diamond films grown on high-temperature and high-pressure (HTHP) diamond and Si substrates were investigated using atom force microscopy (AFM), scanning tunneling microscopy (STM) and current imaging tunneling spectroscopy (CITS) measurement techniques. The films grown on Si consisted of large grains with secondary nucleation, whereas those on HTHP diamond are composed of well-developed polycrystalline facets with an average size of 10–50 nm. Large tunneling currents were observed at some grain boundaries, and the emission character is better at the grain boundaries than at the center of the crystal. The codoped films grown on HTHP diamond have an almost uniform electron emission efficiency at grain boundaries or crystalline facets, which indicates that the doped atoms are uniformly distributed in the films. The local I-V characteristics for films deposited on Si or HTHP diamond substrates indicate n-type conduction.

In this paper, porous carbon was made from biomass derived carbonaceous mesophase and carbonaceous fillers, and further applied as the substrate for CVD grow of nano carbon materials. With the assistance of microwave plasma, the acetone gas was decomposed into carbon and grew on the surface of the porous carbon, which produce ballas diamonds, carbon tubes, nets, petal, and other structures.

A Thermocoupletemperature measurement test of grinding for steel 45 was done to analyse thereason of errors between experimental temperature curve and theoreticaltemperature curve derived by triangular distribution heat source model.It wasshown that,errors of influencing factors,such as grinding heat flow,thermalconductivity,density,specific heat capacity,limited grinding energy andeffective abrasive contact radius,have certain effect on temperature measuredby thermocouple.It was found that the influence of grinding heat flow into aworkpiece is the biggest and the effective radius of abrasive contact thesmallest.It is concluded that as long as the error of each influencing factoris controlled in a certain range,thermocouple measuring temperature curve willmatch with theoretical temperature curve closely.

The dry sliding friction test of normalized T10 steel against hardened quenched and tempered 20CrMnTi steel under normal load of 60 N and sliding speed of 0.29m/s was carried out on a pin-on-disc tribo-tester. The microstructures in the worn surface layer of T10 steel pin and 20CrMnTi steel disc were analyzed by OM, SEM, and TEM, which were all severely plastically deformed. The ultrafine and even nanoferrite grains (5 nm to 200 nm) were observed in the worn surface layer of T10 steel pin, which was considered to be the result of severely shear deformation.

A new grinding temperature measurement platform based on thermocouple is combined with improved thermocouple in production, data acquisition card and procedures compiled by LabVIEW.Experiments of grinding temperature measurement on 45# steel were done on this platform.The purpose of these experiments is to prove this platform accurate by comparing theoretical temperature with experimental temperature measured according to different parameters.