Document oDaXM8oNJQM0a3Z0kb4kLw163

318 rather than to the absence of chrvsotile material, wear debris was heated in vacuo at 1100 C in an attempt to increase the particle size of any crystalline components of the debris. X-ray diffraction of this material showed welldefined lines and toe mineral foirsterite Was positively identified. When chrvsotile asbestos fibfe is heated it loses its water of crystallization at about 650 t and at 780 is transformed into forsterite i 3.3. Thermal analy /Thedehydro* 650 C'is an endotl of that of the origii at 780' C is exothe by differential th (TGA) respectively chrysotile asbestos the changes indica tire equivalentof 5 , shown in Figs. 3(b) the exothermic rea 80 - --r200 (a) 170- \5 | 15" i " 130- zoo (b) 4. (a) TGA curve of debris (run in nitrogen). HFM - 003543