复合软质过渡层对钛纤维增强Ti－Al基复合材料性能的影响

研究了复合软质过渡层对钛纤维增强Ｔｉ－Ａｌ基复合材料界面和性能的影响。结果表明，在增强体与基体间增加复合软质过渡层Ｙ２Ｏ３－Ｃｒ等的钛纤维增强Ｔｉ－Ａｌ基复合材料，其界面有Ｔｉ３Ａｌ、Ｔｉ２Ａｌ、Ｔｉ２Ｃｕ及β相产生，界面结合完整。复合界面的弯曲强度达７０９ＭＰａ，较涂覆单一Ｙ２Ｏ３的钛纤维增强Ｔｉ－Ａｌ基复合材料提高２６％，弯曲挠度提高较小。增加复合软质过渡层有利于钛纤维增强Ｔｉ－Ａｌ基复合材料的强韧化     

复合软质过渡层对钛纤维增强Ti—Al基复合材料性能的影响

研究了复合软质过渡层对钛纤维增强Ｔｉ－Ａｌ基复合材料界面和性能的影响。结果表明，在增强体与基体间增加复合软质过渡层Ｙ２Ｏ３－Ｃｒ等的钛纤维增强Ｔｉ－Ａｌ基复合材料，其界面有Ｔｉ３Ａｌ、Ｔｉ２Ａｌ、Ｔｉ２Ｃｕ及β相产生，界面结合完整。复合界面的弯曲强度达７０９ＭＰａ，较涂覆单一Ｙ２Ｏ３的钛纤维增强Ｔｉ－Ａｌ基复合材料提高２６％，弯曲挠度提高较小。增加复合软质过渡层有利于钛纤维增强Ｔｉ－Ａｌ基复合材料     

Fe—Al2O3复合材料工艺参数的研究

研究了烧结温度、时间、气氛、弥散相粒度及含量等工艺参数对Ｆｅ－Ａｌ２Ｏ３复合材料的密度、硬度及抗拉强度的影响。结果表明，一定的弥散相含量对应有其最佳的烧结温度。烧结时间达一定值后，继续增加烧结时间对烧结无显著影响。减少弥散相粒度和使用纯氢保护，有利于烧结过程的致密化和产品性能的提高。     

Fe－Al_2O_3复合材料工艺参数的研究

研究了烧结温度、时间、气氛、弥散相粒度及含量等工艺参数对Ｆｅ－Ａｌ_２Ｏ_３复合材料的密度、硬度及抗拉强度的影响。结果表明，一定的弥散相含量对应有其最佳的烧结温度。烧结时间达一定值后，继续增加烧结时间对烧结无显著影响。减少弥散相粒度和使用纯氢保护，有利于烧结过程的致密化和产品性能的提高。     

近期粉末冶金文摘

近期粉末冶金文摘烷氧基衍生Ａｌ２Ｏ３－ＴｉＯ２复合粉末的形成和烧结通过使铝和钛的烷氧化物同时水解、随后清洗和干燥,于Ａｌ２Ｏ３－ＴｉＯ２系中当ＴｉＯ２含量在５和２０ｍｏｌ％之间时生成ＡｌＯ（ＯＨ）胶质固溶体。脱水后γ－Ａｌ２Ｏ３固溶体由非晶材料慢慢结...     

水热法制备Y2O3—CeO2—ZrO2超细陶瓷粉末

采用共沉淀－水热法制备了Ｙ２Ｏ３－ＺｒＯ２（ＹＺ）和Ｙ２Ｏ３－ＣｅＯ２－ＺｒＯ２（ＹＣＺ）超细陶瓷粉末（１０ｎｍ左右）。Ｘ射线衍射分析表明，二元钇和锆及三元钇、铈和锆的共沉淀氢氧化物，经水热处理后均可获得四方相复合氧化物，在１７０￣２５０℃温度下进行水热处理，随着处理温度的提高，其氢氧化物的脱水速率加快，脱水更加完全，粉末粒度增大，有机添加剂如聚乙烯醇对水热产物可起到一定的分散作用。     

由快速凝固先凝物获得的新型氧化物弥散强化铜合金：第一部分 显微…

氧化物形成元素锆（Ｚｒ）和钇（Ｙ）在铜中的溶解度频低，将快速凝固和内部氧化两种工艺结合，把铜锆和铜钇合金旋熔成５０～１５０μｍ厚的条带，在７５０～９５０℃使其氧化，产生１％体积的ＺｒＯ２和Ｙ２Ｏ３粒子，其尽寸为５～１５０ｍｍ，粗细氧化物的比例和分布均匀度，与旋熔条带的偏析程度有关，也与合金中氧和被氧化元素的相对透气性有关，二者又取决于内部氧化温度，氧化物弥散体主要是立方晶格氧化锆和氧化钇，而且与基     

Ti3Al-Nb合金超塑压缩变形的研究

研究了Ｔｉ－２４Ａｌ－１４Ｎｂ－３Ｖ－０．５Ｍｏ合金压缩时的超塑变形行为和变形过程中的组织变化。结果表明：所研究合金在ｔ＝９８０℃、ε＝７．２×１０－３ｓ－１的条件下ｍ值为０．３４,压缩时的真应变可大于１．６。在合金的超塑变形初期,Ｏ相发生动态再结晶和等轴化过程。随着变形过程的进行,新形成的Ｏ相晶粒在Ｂ２相中滑动和转动,Ｂ２相中的位错运动和界面扩散起调节作用     

钇在钴基合金和硬质合金中的作用

对钴基合金和ＹＧ８Ｒ硬质合金进行了Ｘ射线衍射、ＳＥＭ、ＴＥＭ和ＥＤＳ的观察和分析。结果表明：稀土的加入对钴相的晶格参数没有影响，但使钴相的粒度显著变小，并使合金中ＷＣ相晶粒尺寸的不均匀和分布的不均匀得到明显改善；在Ｃｏ基（Ｃｏ－ＷＣ－Ｙ）合金中可形成的稀土相有稀土氧化物Ｙ２ＷＯ６和稀土金属经物Ｃｏ５Ｙ８和Ｃｏ２Ｙ。     

利用高氮化能力的熔剂精炼钢除氮

利用试验技术通过调整和精确控制１８７３Ｋ时的氧分压Ｐｏ２测定了Ａｌ２Ｏ３－ＣａＯ－ＴｉＯ２和ＣａＦ２－ＴｉＯ２熔剂中氮的溶解度和氮化能力。据试验发现，熔渣和铁水之间的氮分配比以及金属的脱氮度是Ｐｏ２的函数。文章研究了采用含ＴｉＯ２的熔剂从纯铁和铬合金钢中的除氮工艺，即首先把炉渣与金属粉末混合，然后在１８７３Ｋ坩埚中加热熔化，并将熔融金属从１０ｋｇ感应炉出钢至包中。系统中的氧分压可通过精炼剂中铝或钛含量进行调整。试验结果表明Ａｌ２Ｏ３－ＣａＯ－ＴｉＯ２渣可除去低合金钢中氮，脱氮度可超过６０％。文章讨论了生产过程中采用含ＣａＦ２－ＴｉＯ２熔剂的炉渣进行钢包处理有效去除高合金钢中氮的技术参数。     

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.