本文關(guān)鍵詞： 吸氣材料 粉末注射成形 吸氣性能 激活工藝　出處：《北京有色金屬研究總院》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：ZrVMnCe合金是本課題組近些年新開發(fā)的一種具有激活溫度低、吸氣量大等優(yōu)點(diǎn)的吸氣材料,但ZrVMnCe粉體的燒結(jié)性能相對較差,制備的燒結(jié)材料強(qiáng)度不理想。本文研究通過制備ZrVMnCe-Zr復(fù)合材料,以期獲得機(jī)械性能和吸氣性能兼具的綜合性能。同時,考慮到漿料涂敷或粉漿澆注等傳統(tǒng)的吸氣劑制備技術(shù)在產(chǎn)品一致性差、批量化難度大等方面的不足,本研究工作采用了金屬粉末注射成形工藝制備ZrVMnCe-Zr吸氣劑元件,利用SEM、比表面積和孔徑測試儀和壓汞儀、吸氣測試裝置等設(shè)備測試了吸氣材料微觀形貌、比表面積、孔隙率、材料的吸氣性能,研究了化學(xué)脫脂、ZrVMnCe粉體粒度和不同配比(ZrVMnCe與Zr)、燒結(jié)、激活條件等四個關(guān)鍵工藝環(huán)節(jié)并優(yōu)化了相關(guān)參數(shù)。具體研究工作和主要結(jié)論如下:(1)研究了裝載量、脫脂溫度和脫脂時間對復(fù)合材料注射坯體化學(xué)脫脂效果的影響。研究結(jié)果表明,隨著裝載量、脫脂溫度的升高和脫脂時間的增加,注射坯體的脫脂率也增大。以三氯乙烯為脫脂溶劑,經(jīng)60℃×6h化學(xué)脫脂處理后,裝載量為60%的吸氣材料樣品的脫脂率相對最高,達(dá)到70.2%。(2)研究了 ZrVMnCe粉體粒度、ZrVMnCe與Zr質(zhì)量配比對復(fù)合材料微觀形貌和吸氣性能的影響。研究結(jié)果表明,隨著ZrVMnCe粒度的增大吸氣樣品的吸氣性能呈現(xiàn)出先升高后下降的變化趨勢。100-200目ZrVMnCe粉末所制備的吸氣樣品的孔隙率和比表面積相對最高,吸氣性能也相對最佳。而隨著Zr組元比例的增加,材料的吸氣性能呈現(xiàn)出逐漸降低的趨勢。ZrVMnCe與Zr的質(zhì)量比為6:4所制備的吸氣劑樣品的機(jī)械強(qiáng)度和吸氣性能達(dá)到相對比較理想的狀態(tài)。(3)研究了燒結(jié)溫度和燒結(jié)保溫時間對ZrVMnCe-Zr吸氣材料燒結(jié)特性和吸氣性能的影響。研究結(jié)果表明,ZrVMnCe-Zr吸氣材料的燒結(jié)致密化效果對燒結(jié)溫度和燒結(jié)保溫時間十分敏感。在920℃至1060℃的燒結(jié)溫度范圍內(nèi),隨著燒結(jié)溫度的升高,吸氣材料的孔隙率和比表面積逐漸降低,致密性增加。保溫時間的延長同樣會明顯促進(jìn)材料的燒結(jié)致密化。燒結(jié)溫度為1020℃、保溫時間為20min時,ZrVMnCe-Zr燒結(jié)材料的機(jī)械強(qiáng)度和吸氣性能達(dá)到相對理想的綜合水平。(4)研究了不同激活條件下(激活溫度和激活保溫時間)吸氣材料的吸氣性能。研究結(jié)果表明,隨著激活溫度的升高,材料的吸氣性能也明顯提高。在500℃激活時,材料已經(jīng)可以達(dá)到較好的活化狀態(tài),在此溫度下延長激活保溫時間可大幅提高材料的室溫吸氫性能,ZrVMnCe粒度為100-200目、ZrVMnCe:Zr=6:4所制備的吸氣材料經(jīng)500℃保溫10min激活后的第十分鐘的室溫吸氫速率為2323.8cm3.s-1·g-1,經(jīng)500℃保溫80min激活后第十分鐘的室溫吸氫速率可以達(dá)到7521.9cm3·s-1·g-1。
[Abstract]:ZrVMnCe alloy is a newly developed getter material with the advantages of low activation temperature and large inspiratory capacity in recent years, but the sintering properties of ZrVMnCe powder are relatively poor. The strength of the sintered material is not ideal. In order to obtain the comprehensive properties of both mechanical properties and inspiratory properties, this paper studies the preparation of ZrVMnCe-Zr composites. Considering the shortcomings of the traditional getter preparation technology such as slurry coating or slurry pouring in the aspects of poor product consistency and large difficulty in batch. In this study, the metal powder injection molding process was used to prepare the ZrVMnCe-Zr getter element, using SEM, specific surface area and pore size tester and mercury porosimeter. The micro morphology, specific surface area, porosity and inspiratory properties of the aspirated materials were tested by means of an inspiratory test device, and chemical degreasing was studied. ZrVMnCe powders were sintered with ZrVMnCe and ZrVMnCe in different proportions. The activation conditions are four key process links and the relevant parameters are optimized. The specific research work and main conclusions are as follows: 1) the loading capacity is studied. The effect of degreasing temperature and time on the chemical degreasing of the composite injection billet. The results show that with the increase of the loading amount, the degreasing temperature and the degreasing time increase. The degreasing rate of injection billet was also increased. When trichloroethylene was used as degreasing solvent, after 60 鈩，

本文編號：1470563