Abstract: Ultrasound detectable instrument including a bubble generator having two elements which, upon contact with each other in the presence of a fluid, react with each other to produce gas bubbles which may be detected by sonic imaging equipment. The two elements comprise first and second radially displaced layers of the elements within a fluid permeable carrier material.

Abstract: An ultrasound detectable instrument (10) includes bubble generating means comprising two elements (32a, 32b) which, upon contact with each other in the presence of a fluid, react with each other to produce gas bubbles which may be detected by sonic imaging equipment. The two elements comprise first and second radially displaced layers of said elements within a fluid permeable carrier material.

Abstract: An ultrasound detectable instrument (10) includes bubble generating means comprising two elements (32a, 32b) which, upon contact with each other in the presence of a fluid, react with each other to produce gas bubbles which may be detected by sonic imaging equipment. The two elements comprise first and second radially displaced layers of said elements within a fluid permeable carrier material.

Abstract: A method of bonding a high chrome steel to a fiber composite. An epoxy primer is applied to the high chrome steel, the primer is dried, and thereafter the high chrome steel and the fiber composite are adhered together by using an epoxy adhesive. The invention also includes bonded joints that are made by the method and bonded assemblies having the bonded joint. A joint made using this bonded method has a high torque-to-failure, even after exposure to extreme ambient conditions of high temperature and high relative humidity. The bonding method is particularly suitable for use in bonding high chrome steel and fiber composite components for use in the aerospace industry.