本文選題：化學(xué)鍍鎳 + 擴散連接　； 參考：《燕山大學(xué)》2015年碩士論文

【摘要】：石英玻璃和石英玻璃纖維復(fù)合材料是理想的窗口材料,窗口材料的固定與密封一般使用高分子材料,但高分子材料在服役過程中易出現(xiàn)老化現(xiàn)象,帶來損失。窗口連接材料使用中存在的老化問題就成為亟待解決的問題。本論文采用化學(xué)鍍鎳工藝,制備玻璃與連接處的中間層。使用SPS的方法對石英玻璃與鋁合金,以及石英玻璃之間進行擴散焊接,并對擴散焊接后的界面進行研究。采用無鈀活化鍍Ni-P工藝制備中間層,確定了無鈀活化工藝:硫酸鎳21 g/L、酒石酸鉀鈉11.5 g/L組成混合溶液,用堿液調(diào)節(jié)至膠體狀,加入微量NaBH4制成活化液。將試樣在還原液中浸潤30 s,再浸到活化液中20 s,低溫下迅速干燥,完成活化。鍍液組成及試驗條件優(yōu)化結(jié)果:硫酸鎳32~34 g/L,檸檬酸鈉20~28 g/L,次亞磷酸鈉25~30 g/L,乙酸鈉30 g/L,乳酸15~20 ml/L,碘化鉀0.05 g/L。試驗條件:PH值4.5~5.5,反應(yīng)溫度80~85℃。試驗所得鍍層外貌平整光亮,結(jié)合強度高,含磷量14.40%,非晶結(jié)構(gòu)。研究了化學(xué)鍍鎳層與石英玻璃的擴散行為,確定了化學(xué)鍍鎳層與石英玻璃發(fā)生擴散的最佳條件為:連接溫度800~850℃,連接壓力10~15 MPa,中間鍍鎳層為0.5μm左右,保溫時間30 min。經(jīng)過擴散連接的兩片石英玻璃之間連接緊密,有一定的透光率,可見光透過率可以達到19.5%以上。接頭處有一定的結(jié)合強度,剪切強度為0.60 MPa左右,斷裂類型是基體與界面的復(fù)合斷裂,連接強度較高。使用SPS技術(shù)連接石英玻璃和鋁合金,采用SEM和EDS等分析檢測方法,研究了擴散焊工藝參數(shù)對接頭微觀形貌和元素擴散的影響規(guī)律,確定了擴散連接的最佳工藝:連接溫度500℃,連接壓力4 MPa左右,連接時間5~10 min,中間層厚度0.5μm左右。鋁合金、鍍層和石英玻璃之間緊密連接,接頭的微觀形貌無裂痕和孔洞。
[Abstract]:Quartz glass and quartz glass fiber composites are ideal window materials. The fixing and sealing of window materials generally use polymer materials, but the aging phenomenon of polymer materials is easy to occur in the course of service, resulting in loss. The aging problem in the use of window connection material becomes an urgent problem to be solved. In this paper, the interlayer between glass and joint was prepared by electroless nickel plating. The diffusion welding between quartz glass, aluminum alloy and quartz glass was carried out by using SPS method, and the interface after diffusion welding was studied. Palladium free Ni-P plating process was used to prepare the intermediate layer. The palladium free activation process was determined as follows: nickel sulfate 21 g / L, potassium sodium tartrate 11.5 g / L, mixed solution, adjusted to colloidal form with alkali solution, added a small amount of NaBH4 to make activation solution. The sample was soaked in the reductive solution for 30 s, then immersed in the activation solution for 20 s. The sample was dried quickly at low temperature to complete the activation. The results of bath composition and test conditions were as follows: nickel sulfate 32 ~ 34 g / L, sodium citrate 20 ~ 28 g / L, sodium hypophosphite 25 ~ 30 g / L, sodium acetate 30 g / L, lactic acid 15 ~ 20 ml / L, potassium iodide 0.05 g / L. The test conditions are as follows: the pH value is 4.5% and the reaction temperature is 80 ~ 85 鈩，

本文編號：2014714