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634                                     摩   擦   学   学   报                                 第 41 卷


                  (a)                                                (b)











                         Sliding direction                                      Sliding direction
                                                80 μm                                              80 μm

                                                                      5
             Fig. 10  Optical micrographs of the corresponding wear scar after sliding 4.2×10 r: (a) before AO irradiation; (b) after AO irradiation
                                           5
                                图 10    4.2×10 r后磨斑的光学显微形貌:(a)原子氧辐照前;(b)原子氧辐照后
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                                    2
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