Switching valves in air-con and refrigeration systems (leak-totally free ceramic regulating disks and valves made of SiC display nearly no wear and possess excellent sliding behaviour) The bonding surface was predominantly aluminum, but a number of other substrates were used such as graphite epoxy, titanium and beryllium. Part I of https://www.facebook.com/permalink.php?story_fbid=pfbid0S5kCy9ofdZHP48BK1Hrvo6Pt3k19B6C3UiKxBuAVPiWNcFzDay1yYF1cQ8EJW8J3l&id=61562415773754&__cft__[0]=AZXd1QS2rNIw0qnZk5SlTD4NeGL6ozkZ05OUFZf974x4uy-c_LkoZRNsxLRo7BHhrLw_dUFCvDc9tZE7JkMCRnFLitbS8BucwCZAdgnNsH-HGQu7qS7ch0ZnGuroOqn885RVgQCxYP2ooevu9vI6rYzIlxcWvi0RjlGnvsd5xQe5gYhl70YA4cgtMcB5F_JhGJm0Oxe2VCB19HHzcdQXo-Ky&__tn__=%2CO%2CP-R