高温熔炼用石墨坩埚涂层工艺研究  

STUDY ON COATION TECHNOLOGY DURING SMELTIN WITH GRAPHITE CRUCIBLE

作　　者：肖云峰[1] 周晋林[1] 唐清富[1] 蒋驰[1] 税毅[1] 王术刚[1] 刘春荣[1] 

机构地区：[1]中国工程物理研究院,621700

出　　处：《炭素》2000年第4期18-22,共5页Carbon

摘　　要：总结了石墨表面用机械手夹持美国Ｍｅｔｃｏ公司９Ｍ等离子枪喷涂Ｎｂ，Ｍｏ，ＣａＺｒＯ３，ＺｒＯ２（Ｙ２Ｏ３）粉制备耐热涂层的喷涂工艺，测试了石墨涂层在真空中１１０℃／ｍｉｎ～１２０℃／ｍｉｎ升至１６００℃再冷却至室温时的热震稳定性，并对涂层作了金相，Ｘ射线衍射反扫描电镜分析。结果显示，石墨样品表面的Ｍｏ／ＺｒＯ２（Ｙ２Ｏ３）或ＣａＺｒＯ３／ＺｒＯ２（Ｙ２Ｏ３）复合涂层经强热震试验后附着强度仍大于石墨本身抗拉强度。带Ｍｏ／ＺｒＯ２（Ｙ２Ｏ３）涂层之坩埚在１６００℃熔炼铀铌合金，铸锭炭增量为１７μｇ／ｇ～２６μｇ／ｇ，带ＣａＺｒＯ３／ＺｒＯ２（Ｙ２Ｏ３）涂层之坩埚在１６００℃熔炼低碳铀，铸锭炭增量为０～１０μｇ／ｇ。The technology spraying Nb、Mo、CaZrO3 and ZrO2(Y2O3) powder on graphite with plasma was summarized. The resistance for thermal shock of coatings on graphite was tested,Microstructurs of various coating was analyzed.We used graphite curcible with these coatings to smelt uranium or its alloy at 1600℃. The carbon increment of uranium ingot was from zero to ten μg/g with CaZrO3/ZrO2(Y2O3) coating, The carbon increment of uranium alloy ingot was from seventeen to twenty - six μg/g with Mo/ZrO2(Y2O3)coating.

关 键 词：石墨坩埚 热喷涂 涂层 铀 铀合金 熔炼 

分 类 号：TQ165[化学工程—高温制品工业]