 In PVC , cadmium was used as heat , light , and <unk> stabilizers . Currently , cadmium stabilizers have been completely replaced with barium @-@ zinc , calcium @-@ zinc and <unk> @-@ tin stabilizers . Cadmium is used in many kinds of <unk> and bearing alloys , because a low coefficient of friction and fatigue resistance . It is also found in some of the lowest @-@ melting alloys , such as Wood 's metal . 
