本文選題：鎳基多孔材料 + 蒙乃爾�。� 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：鎳基多孔材料具有形狀穩(wěn)定、耐高溫、耐腐蝕、滲透性好等優(yōu)點,常用于制作過濾材料、電池、電極、吸聲材料、吸能材料、及生物材料等功能性材料,具有很好的應(yīng)用前景和開發(fā)價值。目前鎳基多孔材料的制備工藝較復(fù)雜、成本高、孔隙率和孔徑難以控制,本研究采用無毒、化學(xué)穩(wěn)定性好、分解溫度高的K2C03作為造孔劑,用燒結(jié)-溶解的方法制備鎳及鎳合金多孔材料。主要研究了鎳基多孔材料的制備工藝及參數(shù),以及不同參數(shù)對樣品孔隙率、孔徑、透氣度及力學(xué)性能的影響,得到以下結(jié)論:(1)實驗采用粉末冶金法,以K_2CO_3為造孔劑成功制備了純鎳和蒙乃爾多孔過濾片試樣,該方法具有工藝簡單、流程短、成本低、孔隙率孔徑可控等優(yōu)點。(2)實驗所制備的純鎳多孔過濾片試樣孔隙率為26.91%～47.32%、平均孔徑為6.3μm～14.0μm、厚度在1.82～2.68mm,開孔率在88%以上;蒙乃爾多孔過濾片試樣孔隙率為31.38%～46.37%、平均孔徑為3.9μm～6.2μm、厚度在1.78～2.67mm,開孔率在90%以上。(3)純鎳和蒙乃爾多孔材料的孔隙率均隨著壓制壓力、燒結(jié)溫度、保溫時間的增加而減小。實驗所制備的純鎳多孔過濾片,透氣度為96.31～389.98m3/(h·kPa·m2);蒙乃爾多孔過濾片,透氣度為21.65～131.95m3/(h·kPa·m2),兩種過濾片試樣的透氣度均隨著造孔劑配料體積分?jǐn)?shù)的增加而增加、隨壓制壓力增加減小;在1000℃～1250℃的燒結(jié)溫度范圍內(nèi),純鎳多孔材料的孔徑、透氣度先升高,后降低。在850℃～1000℃的燒結(jié)溫度范圍內(nèi),蒙乃爾多孔材料的孔徑、透氣度先升高,后降低。(4)孔隙率為26.91%～47.32%的多孔鎳其抗壓強(qiáng)度為25.2MPa～22.8MPa。能滿足大多數(shù)過濾器件對抗壓強(qiáng)度的要求�？紫堵蕿�31.38%～46.37%的蒙乃爾多孔材料在壓縮過程中沒有表現(xiàn)出明顯的屈服平臺。隨孔隙率增加,應(yīng)力-應(yīng)變曲線初試階段斜率減小,彈性模量下降。
[Abstract]:Nickel-based porous materials have the advantages of stable shape, high temperature resistance, corrosion resistance, good permeability and so on. They are often used to make filter materials, batteries, electrodes, sound-absorbing materials, energy-absorbing materials, and biomaterials and other functional materials. It has good application prospect and development value. At present, the preparation process of nickel-based porous materials is complex, the cost is high, the porosity and pore size are difficult to control. In this study, K2C03, which is nontoxic, chemical stability and high decomposition temperature, is used as pore-forming agent. Nickel and nickel alloy porous materials were prepared by sintering-dissolution method. The preparation process and parameters of nickel based porous materials and the effects of different parameters on the porosity, pore size, air permeability and mechanical properties of the samples were studied. The conclusions are as follows: (1) Powder metallurgy was used in the experiment. Pure nickel and Monel porous filter samples were successfully prepared with K2COS3 as pore-forming agent. The method has the advantages of simple process, short process and low cost. (2) the porosity of pure nickel porous filter is 26.91%, the average pore size is 6.3 渭 m ~ 14.0 渭 m, the thickness is 1.82 ~ 2.68 mm, and the porosity is over 88%; The porosity of Monel porous filter is 31.38%, the average pore diameter is 3.9 渭 m ~ 6.2 渭 m, the thickness is 1.78 ~ 2.67 mm, and the porosity is more than 90%. (3) the porosity of pure nickel and Monel porous materials decrease with the increase of pressing pressure, sintering temperature and holding time. The permeability of pure nickel porous filter is 96.31~389.98m3/ (h KPA m 2), Monel porous filter is 21.65~131.95m3/ (h KPA m 2), the permeability of the two kinds of filter increases with the increase of volume fraction of pore-making agent and decreases with the increase of pressing pressure. At sintering temperature of 1000 鈩，

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