Abstract: An article comprising a substrate containing silicon and a barrier layer which functions as an environmental barrier coating and, more particularly, a barrier layer which comprises hafnium silicate and, optionally, zirconium silicate and a method for forming the hafnium silicate as a barrier coating.

Abstract: An article comprising a substrate containing silicon and a barrier layer which functions as an environmental barrier coating and, more particularly, a barrier layer which comprises hafnium silicate and, optionally, zirconium silicate and a method for forming the hafnium silicate as a barrier coating.

Abstract: A thermal-oxidative process is used to remove a casting core from a cast part.

Abstract: A wire connector (10) is disclosed having a clamping member (12) and a mating wedge (14). The clamping member includes two oppositely formed rolled over edges (18, 20) that form two opposing concave channels (22, 24) for receiving a pair of conductors (26, 28) and the wedge for locking the conductors tightly in place. The wedge includes two opposite edges (44, 46) that engage the two conductors when the wedge is in its closed position. A pair of members (64, 66) extend from an end (48) of the wedge and have edges (68, 70) that converge from the edges (44, 46) toward the longitudinal axis 42 of the wedge for engaging and camming the conductors into position within the clamping member during insertion of the wedge. The two members (64, 66) are spaced apart to form a clearance cutout for straddling the jaw of an insertion tool.