天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

當(dāng)前位置:主頁(yè) > 科技論文 > 電子信息論文 >

Cu-Cu及Cu-Al的電鍍Ni低溫連接界面及連接強(qiáng)度的研究

發(fā)布時(shí)間:2018-05-03 20:40

  本文選題:低溫連接 + 電鍍鎳; 參考:《哈爾濱工業(yè)大學(xué)》2017年碩士論文


【摘要】:焊接界長(zhǎng)期致力于尋找新的連接技術(shù);經(jīng)過(guò)多年的研究和發(fā)展,一些特種先進(jìn)連接方法,如激光焊、電子束焊、摩擦焊以及微連接技術(shù)等已經(jīng)成為了現(xiàn)代連接技術(shù)的重要組成部分。電鍍作為一種已經(jīng)發(fā)展相對(duì)成熟的表面改性工藝,其在連接領(lǐng)域的用途和潛力并未引起國(guó)內(nèi)外學(xué)者足夠的關(guān)注。本研究旨在通過(guò)電鍍鎳的方式對(duì)Cu-Cu試樣以及Cu-Al試樣進(jìn)行連接,探索電鍍工藝在連接領(lǐng)域的可行性及可靠性,使之成為一種具有特殊用途的新型連接技術(shù)。本文采用電鍍鎳的方式,對(duì)Cu-Cu試樣以及Cu-Al試樣進(jìn)行了低溫連接試驗(yàn),探索了電鍍連接工藝,通過(guò)透射電子顯微鏡等表征手段研究了連接界面的組織結(jié)構(gòu),分析了電流密度對(duì)鍍鎳連接層的影響,并通過(guò)單向拉伸試驗(yàn)測(cè)試了連接接頭的抗拉強(qiáng)度;此外,本文還對(duì)Cu-Al試樣進(jìn)行了老化處理,分析了老化時(shí)間對(duì)Al/Ni界面金屬間化合物的演化及其界面結(jié)合強(qiáng)度的影響;陔婂僋i的Cu-Cu及Cu-Al的低溫連接工藝,其電鍍液配方以氨基磺酸鎳為主鹽,氯化鎳為活化劑,硼酸為PH值穩(wěn)定劑;得到了形貌均勻、內(nèi)部致密的鍍鎳連接層,實(shí)現(xiàn)了Cu-Cu及Cu-Al的電鍍Ni低溫連接。Cu/Ni界面為一個(gè)60 nm寬度的Cu、Ni原子擴(kuò)散區(qū)域,該區(qū)域是一層FCC結(jié)構(gòu)的銅鎳原子無(wú)限置換固溶體Cu_xNi_(1-x)。Al/Ni界面為一個(gè)寬度約為100 nm的Al、Ni原子擴(kuò)散區(qū)域,界面中靠近Ni側(cè)存在一個(gè)寬度約為20 nm的AlNi相,該相的晶體結(jié)構(gòu)為BCC。Cu-Cu電鍍Ni低溫連接,接頭抗拉強(qiáng)度為100~280 MPa,斷口位于鍍鎳連接層或者銅基材;其連接強(qiáng)度可以超過(guò)基材本身。Cu-Al電鍍Ni接頭在老化前的平均連接強(qiáng)度為124 MPa,200℃恒溫老化1000 h后為122 MPa,等溫老化處理對(duì)Cu-Al電鍍Ni接頭強(qiáng)度無(wú)影響。此外,Cu-Al電鍍Ni接頭在200℃恒溫老化1000 h后,Al/Ni界面并無(wú)IMC生長(zhǎng)。鍍鎳連接層生長(zhǎng)速度方向上硬度隨電流密度增大而增大;而其垂直生長(zhǎng)速度方向的硬度不受電流密度影響。鍍鎳連接層的晶粒在(111)、(200)以及(220)晶面法向上的平均厚度分別為188~208?、138~187?以及83~139?;電流密度越大,鍍鎳連接層的晶粒尺寸減小。
[Abstract]:After many years of research and development, some special advanced connection methods, such as laser welding, electron beam welding, Friction welding and micro-bonding technology have become an important part of modern bonding technology. Electroplating as a relatively mature surface modification process, its application and potential in the field of bonding has not attracted enough attention from domestic and foreign scholars. The purpose of this study is to study the feasibility and reliability of electroplating on Cu-Cu and Cu-Al samples by means of nickel plating, and to make it a new type of bonding technology with special application. In this paper, the low temperature bonding tests of Cu-Cu and Cu-Al samples were carried out by means of electroplating nickel, and the electroplating bonding process was explored. The microstructure of the interface was studied by means of transmission electron microscope (TEM). The effect of current density on the nickel coating is analyzed, and the tensile strength of the joint is tested by uniaxial tensile test. In addition, the aging treatment of Cu-Al sample is also carried out. The influence of aging time on the evolution and bonding strength of intermetallic compounds at Al/Ni interface was analyzed. The low temperature bonding process of Cu-Cu and Cu-Al based on electroplating Ni. The electroplating solution is composed of nickel aminosulfonate as main salt, nickel chloride as activator and boric acid as PH stabilizer. The electroplated Ni / Ni interface of Cu-Cu and Cu-Al is characterized by a 60nm Cu-Ni atom diffusion region. The interface of a layer of FCC structure copper-nickel atom infinite displacement solid solution Cu_xNi_(1-x).Al/Ni is a 100nm wide Alnio Ni atom diffusion region. There is a AlNi phase with a width of about 20nm near the Ni side of the interface. The crystal structure of the phase is BCC.Cu-Cu electroplated Ni low temperature bonding. The tensile strength of the joint is 100 ~ 280MPa. The fracture surface is located in the nickel-plated bonding layer or the copper substrate. The bonding strength can exceed that of the substrate itself. The average bonding strength of Cu-Al electroplated Ni joints before aging is 124MPa after aging at 200 鈩,

本文編號(hào):1840005

資料下載
論文發(fā)表

本文鏈接:http://sikaile.net/kejilunwen/dianzigongchenglunwen/1840005.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶f4f36***提供,本站僅收錄摘要或目錄,作者需要?jiǎng)h除請(qǐng)E-mail郵箱bigeng88@qq.com
91欧美视频在线观看免费 | 在线欧洲免费无线码二区免费| 东京干男人都知道的天堂| 91精品国产综合久久精品| 少妇激情在线免费观看| 亚洲成人免费天堂诱惑| 可以在线看的欧美黄片| 国产精品午夜福利在线观看| 国产一区麻豆水好多高潮| 欧美激情一区=区三区| 国产又色又爽又黄又大| 麻豆看片麻豆免费视频| 国产一区二区三区香蕉av| 在线观看视频日韩精品| 国产综合一区二区三区av| 高清国产日韩欧美熟女| 国产超碰在线观看免费| 日韩一区二区三区有码| 欧美在线观看视频免费不卡| 国产欧美一区二区另类精品| 福利视频一区二区在线| 日本东京热视频一区二区三区| 久久久精品日韩欧美丰满| 99久久国产精品亚洲| 欧美日韩精品人妻二区三区| 精品日韩视频在线观看| 日本一区二区三区久久娇喘| 伊人久久五月天综合网| 国产又大又硬又粗又湿| 日韩精品一区二区一牛| 亚洲午夜福利视频在线| 国产欧美日韩精品自拍| 少妇丰满a一区二区三区| 老司机精品视频免费入口| 成年人免费看国产视频| 欧美老太太性生活大片| 欧美一区二区三区十区| 大香蕉伊人一区二区三区| 精品精品国产自在久久高清| 国产亚洲精品久久99| 欧美大粗爽一区二区三区|