The graphite sheet (Gr)/6061Al composites with Gr content of 1~25vol.% were prepared by vacuum hot-pressure sintering. The nano-aluminum powders were adopted as cladding materials on the surface of graphite sheet to improve the dispersal uniformity of graphite sheet within aluminum matrix. The graphite sheet dispersed uniformly in the aluminum matrix, and the interface between aluminum and Gr was well integrated without interfacial reaction product being found. The presence of few layer graphene was observed by transmission electron microscopy (TEM). The relative densities of the Gr/6061Al composites with 1~15vol% Gr content are all higher than 90%. The relative densities of the samples were decreased with the increasing of graphite content; and the coefficient of friction(COF) of the samples possess the same trend. The wear rate of the samples with Gr content of 5vol.%, 10vol.%, 15vol.% and 25vol.% are all higher than that with 1vol.% Gr content.An experimental set-up was designed for measuring the self-field losses of Bi2223/Ag HTS tapes using a transport current method.