(54.236.62.49) 您好!臺灣時間:2021/03/08 03:17
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:顏瑞祥
研究生(外文):Yan, Rui-Xiang
論文名稱:電解沈積氧化鋯及冷加工對AISI430不?袗?氫擴散之研究
論文名稱(外文):The study of electrolytic deposition of ZrO2 thin films and cold work effects on the hydrogen diffusing of the AISI 430 stainless steels
指導教授:顏秀崗顏秀崗引用關係
指導教授(外文):Yan, Xiu-Gang
學位類別:碩士
校院名稱:國立中興大學
系所名稱:材料工程研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:1998
畢業學年度:86
語文別:中文
論文頁數:114
中文關鍵詞:AISI 430不?袗?電解沈積氧化鋯冷溫加工再結晶退火氧化物層微結構遲滯時間穿透時間擴散係數表面氫濃度氫擴散電解沉積冷加工430 不?袗?材料科學工程
外文關鍵詞:AISI 430 stainless steelElectrolytic depositionZrO2Cold workRecrystallization annealingOxide filmsMicrostructuresTime-lagBreakthrough timeDiffusivityhydrogen diffusionelectrolytic depositioncold workMATERIALS-SCIENCEENGINEERING
相關次數:
  • 被引用被引用:0
  • 點閱點閱:72
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0

Through electrolytic deposition ZrO2, cold work, and
recrystallization annealing, the effects of oxide films and
microstructures on the hydrogen diffusion of the AISI 430
stainless steel had been investigated. The time-lag (),
breakthrough time (), diffusivity and sublayer concentration
were derived by hydrogen diffusion tests. The morphology and
microstructures were analyzed by scanning electron microscopy
(SEM), optical microscopy (OM), and X-ray diffractometer (XRD),
respectively.It was found that thickness of ZrO2 coating on 430
stainless steel is increased with increasing time, while the
time-lag was not. Because of the longer deposition time, the
micro-crack would be found during drying or sintering, which
made hydrogen atoms easier diffuse into the 430 stainless steel
substrate. Only for a proper coating time, a uniform ZrO2 film
could be obtained. Its effect of preventing the hydrogen
diffusion was even better than thermally grown oxide films on
430 stainless steel. By the analysis of a mathematical model,
the retarding effect on hydrogen entry of electrolytic
deposition ZrO2 on AISI 430 stainless steel is mainly because of
a very low diffusivity .The dislocation density was increased
with the increasing of cold work degree, so was the dislocations
trapping effect which would decrease the effective diffusivity,
especially in 50% cold work. After annealed at 1073K, the
grain size of 50% cold work 430 stainless steel was increased,
and the ratio of grain boundary to lattice was decreased with
increasing time. XRD showed the highest ratio of (110) preferred
orientation and the hydrogen permeation tests showed the
shortest time-lag for 120 min annealing. It was considered that
a quicker diffusion path such as the lattice diffusion of (110)
preferred orientation replaced that of random orientation, and
the grain boundary as a barrier for lattice diffusion was
further reduced.

QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔