A sintered ceramic article includes a silicon carbide tube and a silicon carbide base component circumscribing at least a portion of the tube and sinter-bonded to the tube. The sinter bond between the tube and the base component is defined as an interface bond and includes no bond materials. The interface bond has at least one of the following performance characteristics: a Shear Strength not less than about 25 MPa, a Nitrogen Seal Performance of not greater than 10%, a Helium Seal Performance of not greater than 10%, and/or a Vacuum Seal Performance of not greater than 10%.