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??????? ???? ???????? - ????? ?? ???? P / M ???????.
?? ?? ??? ?????? ?? ???? , ??????? ???? ????? ?? p ??? ???????. ??????? ( ??????? P / M " ????? " ) . ??? ????????? ???? ???????, ??? ?? ?? ????? ????????????? ???????, ????????? ????? ?????, ??? ????? , ?? ???. ??????? ??????? ??????? ????? ???? ??????? ???????? (?????? ?????? ??????) , ?????? ???? (?????? ????? ?????? ) , swaging ( ????? ) , ???? (?????? ?????? ) , ???? ( ?????????????? ) . ?????? ????? ???? ?????? ????? ???? ?? ?????, ????? ????? , ???????, ???? ???????????? ???. ?????? ????? ????????? ??????? ??????? ????? , ????? ????? ?? ????? ?? ???? , ??????? , ?? ??? Yih?????. ????? ????, ?????? ??????? ?? ??????? ??? ??? ????? ???????. ???? sintered?, ??????? ??? ???? ???? ?????????? ?????? ????, ???? ???? recrystallized ( ??????? ???? )??? ????? ??? , ????. ??? ??? ??? ??????,?????? ????????? ????? ?? ????? ??????? ?? ????? ??????, ???? embrittlement ???? segregations ???? ????? ?? ??????? ?????? ??????, ???? ???? , ????, ????. ?? ????????? ?? ????? ??? ????? ????? , ??????? ??? ?????? ?? ??? ??? ???? ???? intergranular , ?? ????? ?? ???? ???? ????????? ???? ?????? ????? ????? ?????????? ?????? ???? .
???? ?????? ????? ????? ???? ??? ?1500-1700 ℃. ?????? ????? ?????? ????? ???????? ????? ?????? ?? ???????, ??? ???? ????? ???? ?????? ?????? ???????? ?? ?????, ?? ???? ???? ?????? ??????? ?????????? ??? ??????? ????? ??? ?????? ?????. ?? ????? ???? ????????? ????? ???, ????? ???????? ???? ????? ??????. ??? ?????? ????? ?????, ????????? ?????? ??????? ?????? ??? ???????? recrystallization ????? ??? ?????? ?????. ??????? ??? ???? ??? ??? ???? ????????? ?????? ???? ???, ?? ????? ???? ??? ?????? ?? embrittlement ???? ?????. ?? ????? ????? ?????? ????? ?????, ?? ?????? ????? ?? ????? ??? ??????? ????? ???????, ???? ?????? annealings ????? ???? ??? ????? ?? ???????? ?? ????? (???????) ??????? ?overstraining ??? ??????.
????? ?? ??????? ?????? ???? ??? ??? ???? ????????.??????, ??????? ??? ?????? ?????. ????? ??????? trioxide ?? ??? ???? ?? ???? ????, ???? ?800 ℃, ?? volatilizes.???? ?????? ????? ????? ??? ???? ????? ???? ?????? ?????? ?????? ??????? ?? ????? ?? ??? ????? ? / ?? ????? ????. ????? ?????? ?????? ????? ?? ??? ????? ????? ??? ????? ????? ????? ?? ????? ?????????? ?? WO3.
??????? ???? ???????? - ????? ?? ??????? - ?????.
??????? ?????? ???????? ????, fabricability ?? ??????? ??? ????? ????: ??????? ???? ???? ????? ????? ???? ??????. ?? ???? ?????????? ?????? ???? ?????, ????? ?? ??? ???????? ?????? ????? ?????, ????? ?????, ????? ?? ??? ???????? ?????? ????. ???????? ?? ??? ????? ????? ?????, ?? ????????? ?? ?????, ?????? ???? ?? ?????. ?????? ????? ?????, ???? ????? ???? ???????, ?????, ?? ?????, ?? ???? ????????? ???.
?? ??, ?????? ???? ??????? ?? ????? ???? ???? ?????? ????? ??? ??????? ?? ?????? ????? ?????.??????? ????? ??????? ?????? ?????? ??? ?? ????? ???? ?? ???? ??. ???, ?????? ??????? ???? ???? ????? ???? ????? ??? ???? ????? ??? ????? ?????? ??????. ?? ????? ?????? ????? ?? ???? ??????, ??? ??????, ????????? ????? ???? ???? ?????? ??????. ?????????? ??????, ???? ????? ???? ?????? ???????, ?????, ?????. ????? ???? ?? ??????? ??? ????? ????? ????? ??? ????? ???? ?? delamination. ????? ??????? ??????? ?????? ??????? ?? ??? ???????, ????? ?????, ?? ?????.?????? ???????? ???? ??? ??? ???? ??????? ????? ??????????.
??????? ???? ???????? - ????? ?? ??????? - Bonding ?? ???????
????? ???????. ????? ???????, ???? ???? ?????, ?? ?????, ???? ?????? ??????? ????? ?? ??????? ???????, ????? ?????? ?? ???? ????? ???? ???? ??????? ? / ?? ????. ???? ?????? ?? ???? ??????? ????????. ????? ????? ???? ?????? ??????, ???? ???? ?????, ??????, ?????? ??????, ??? '
?????.?????? ????? ?????? ?????? ????? ??????? ?????, ?????, ???????, ?? ??????? ?????. ??????? ??? ???? ???? ??????, ????? ????? ?????? ??? ??? ??, ????, ?? ??????. ?? ???? ???? ???? ?? ?????, ??????? ???? ????? ????? ???? ????????? ?????? ???? ???. ????? ????? ????????? ??????????; Rh (1970 ℃), ???? (1430 ℃), ?? AgCu20Pd15 (700-900 ℃). ???? ???? ???? ?????. ????? ?? ??????? ???????, ?????, ???????? ???? ?????? ???? ?????? ?? ?????? ??????? ???? ????.
????? . ??????? ????? ?? ?????? ????? ??????. ????? ????? ?????? ??? ????????? ????? ??????? , ????????? ???? , ??? ?? ????? ?? ??? ???? ????? ?? ?????? ?? ?????. ???? ??????,????? ????? ????? degreased????? , ???? ??? ??????? ?? ????? ???????????? ????????????? ( 90/10 % ??? ) . ?????? ????????? ?? ???? ????? ?? ?????? , ??? ????? ???? , ???? ??? ???? ????? ?? ????? ??????? ??????. ???? ????? ????? ??????? ??? ????? ?? ?????? ??????? ( TIG ) , ????? ???? ????? (????? ????? ) , ????? , ????? ??????????? ??? ?????????,?????? ????????? ????? ????? ???????. ???? ????? ????? ??????????????? W- Re??? ???? . ??????? W- Re ( ???? W- 26Re ) ??????? ????? ????? ?????? ???????. ??????? ???? ????? ??????? ?????? ??????? ?????? ?????. ????? ????? ???? ?????? ?? ???????, ????????? ?? 1300-2000 ℃ ?????? ?? ?"? -2 ? 2 - 20N ??? ?????? ??????? ????. ????? ?????? ?? ???? , Pt , Rh , ?? ,?Pd ????? ?? ????? ???????. ???? ??????? ???? ???? ??????????? ????? ???? ?????? ?? ???.
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