strength and uniformity of a thermal spray coating applied to the roughened surface the roughened surface may be used in for example an internal surface of a cylinder bore of an internal combustion engine in additional embodiments the adhesion strength between two articles may also be increased using the surface roughening method to roughen an external peripheral surface of for example a cylinder liner that is to be inserted as a sleeve into a cast cylinder block various exemplary embodiments of the present invention will now be described with reference to the drawings by specifying particular steps in the present disclosure it is not meant to limit the invention to performing those steps in a particular order unless an order is specified similarly listing particular steps in a particular order is not intended to preclude intermediate steps or additional steps as long as the enumerated steps appear in the order as specified certain materials and articles suitable for practicing the present invention are disclosed however additional equivalent materials and articles may be substituted in practicing the invention as known to one skilled in the art the detailed description of the present invention is not intended to describe every embodiment or each implementation of the present invention other embodiments and their equivalents are within the scope of the present invention in.