비의류제품

fabrication of self-lubricating hard coatings by ion beam techniques. (quarterly technical progress report, january--march 1990)

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 523
the research effort at universal energy systems, inc. (ues) is focused at establishing optimum conditions for ion implantation/mixing of suitable additives into the surfaces of al(sub 2)o(sub 3) and zro(sub 2). in the last quarterly report, we presented the results of friction and wear properties of ion beam mixed baf(sub 2)/caf(sub 2)ag layered structure with al(sub 2)o(sub 3) and zro(sub 2). the friction and wear of ion mixed al(sub 2)o(sub 3) was found to increase under room temperature test, presumably due to the abrasive nature of baf(sub 2) layer on the surface. the friction and wear of ion mixed zro(sub 2) remained about the same. it should be mentioned that the amount of mixing was very small and limited to the interfaces of layered materials and, therefore, the contact between the sample and the counterbody was between baf(sub 2) and either al(sub 2)o(sub 3) or zro(sub 2), since only the samples were ion mixed. it was shown by the group at anl that the ion beam assisted (iad) ag coating reduces the friction coefficient of al(sub 2)o(sub 3) quite dramatically at temperatures between room and 400(degrees)c based on this result we decided to form a bi-layer structure of caf(sub 2)ag with ag on top. the layer structure was fabricated by iad method utilizing electron beam evaporation and 500 ev ar(sup +) ion bombardment