冷压烧结溶解法制备多孔泡沫铝合金的研究

对在6061铝合金中加入可溶性填充物混合-压制-烧结-溶解造孔的制备多孔泡沫铝合金方法及其工艺参数进行了探讨，通过控制金属材料与填充材料的尺寸和比例来获得孔径均匀、孔隙率可控的多孔泡沫金属材料，已制备出相对密度为0．5—0．6，平均孔径为0．10-0．25mm，孔隙率为40％-50％的多孔泡沫铝合金试样。该方法较好地解决了直接压制烧结法在高压下破坏了材料的多孔性以及机械强度和高孔隙率不能同时保证的矛盾。     

泡沫金属材料的特性,用途及制备方法

泡沫金属是一种新型的多孔金属材料，本文综述了泡沫金属的性能特性，应用领域，制备方法及发展趋势。     

多孔金属材料制备工艺及展望

本文介绍了多孔金属材料现阶段的发展状况、常用制备工艺及功能应用,并对多孔金属材料的发展趋势进行了展望。制备方法主要是从熔体、粉末、沉积几方面展开概述,再对各种工艺的制备原理、优缺点、孔隙率和金属材料进行了综述,并列举了近年国际、国内采用新型发泡剂和造孔剂对多孔金属的研究状况和成果。多孔金属材料既可以用于结构材料也可以用于功能材料,在减振、吸能及轻量化方面有着广阔的应用前景。     

多孔泡沫金属的制备方法与应用前景

多孔泡沫金属是一种由金属基体和气孔组成的新型多功能复合材料，由于其具有很多其他金属材料所没有的良好性能，因此得到了愈来愈多的关注和研究兴趣。本文介绍了多孔泡沫金属的性能、用途及几种制备方法，并对其发展前景进行了展望。     

多孔结构对材料吸波性能的影响

总结了当前多孔材料吸波性能的研究现状，指出多孔结构可改善材料的吸波性能，而孔径、相对密度及厚度是影响多孔材料吸波性能的重要因素，对多孔陶瓷材料而言，适当降低孔径、增加相对密度与厚度有利于提高材料的吸波性能．在此基础上对多孔金属材料泡沫铝的吸波性能进行了初步研究，分析了相对密度与微波频率对材料吸波性能的影响，研究表明，降低多孔金属的相对密度可以显著提高材料的吸波性能；随着微波频率的增加，材料的吸波性能也随之增加．     

泡沫铝及其复合材料的研究进展

泡沫金属是一种由金属基体和气孔组成的新型结构功能材料，相对于实体金属材料，泡沫金属材料以牺牲了强度等力学性能为代价，获得了诸如热、声、能量吸收、轻质等优越性能，成为一种新型结构功能材料。泡沫铝是一种在铝基体中形成很多气孔的轻质多孔金属材料，同时兼有金属和气泡特征，它密度小、耐高温、防火性能强、抗腐蚀、隔音降噪、导热率低、电磁屏蔽性高、耐候性强、有过滤能力、渗透性好，具有良好的阻尼特性和电磁屏蔽能力，广泛应用在冶金、化工、航空航天、船舶、电子、汽车制造和建筑业等领域。对泡沫铝制备方法和物理性能的研究有利于提高其性能、扩大其应用领域，本文概述了泡沫铝的制备方法、物理性能及增强泡沫铝基复合材料的研究进展。     

梯度多孔金属材料制备及应用的研究进展

梯度多孔金属材料是一种性能优良的新型多孔材料,具有不对称的孔结构,这种结构实现了多孔材料过滤行业的小孔径、大透气这一要求,同时良好的力学性能使得梯度多孔金属材料的应用较陶瓷膜的应用更为广泛.本文综述了梯度多孔金属材料制备工艺和研究应用概况.     

多孔金属材料的制备方法及应用研究

多孔金属材料是一种兼具结构和功能双重性能的材料,因为其具有许多优越的性质,在很多领域得到了广泛的应用.根据当前多孔金属材料的研究进展和发展形势,阐述了制备多孔金属材料的工艺,结合其性能探讨了它的应用现状,并针对当前面临的问题进行了归纳和总结.     

添加升华性造孔剂的放电等离子法制备多孔铝块体材料

为解决高孔隙率多孔金属材料制备过程中的污染问题,以升华性萘颗粒为造孔剂,采用放电等离子脉冲烧结法(SPS)进行多孔铝块体材料的制备。结果表明,升华性造孔剂可在实现多孔铝材料高孔隙率的同时,有效提高其洁净度。采用该方法在350℃时可以制备出结构与尺寸可控性好、开孔效果好、孔隙率(63.33%)较高、粉体颗粒无明显长大的多孔金属铝块体材料。升华性造孔剂可对孔隙体积进行有效调节,实现多孔铝材料体内小孔与大孔的合理搭配,进一步改善多孔铝材料孔隙之间的连通性,该方法与SPS烧结技术相结合后,对于开孔性与颗粒连接性要求较高的多孔金属材料制备具有技术优势。     

放电等离子烧结法制备以升华性材料为造孔剂的人体植入骨替代多孔镁块体材料

以萘为造孔剂, 采用放电等离子烧结技术(spark plasma sintering, SPS)制备多孔镁块体材料。结果表明, 采用放电等离子烧结技术在470℃时可以制备出结构与尺寸可控性好、开孔率与孔隙率(44.25%)较高、粉体颗粒无明显长大的多孔金属镁块体材料。升华性造孔剂可对孔隙体积进行有效调节, 实现多孔镁材料体内小孔与大孔的合理搭配, 进一步改善多孔镁材料孔隙之间的连通性。将升华性造孔剂与放电等离子烧结技术相结合后, 对于开孔性与颗粒连接性要求较高的多孔金属材料制备具有技术优势, 并对解决传统造孔剂法制备生物多孔金属材料所面临的二次污染问题具有很好的借鉴意义。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.