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and Casting Co., Ltd., Jingdezhen 333000, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021 Abstract: The effects of hot extrusion and addition of Al2O3p... are materials with strong vitality emerging in response to the development requirement of many industries that composed of Al or its alloys, and various kinds of hard reinforced particles like Al2O3......
after milling. The glass-ceramic samples were conducted with Vickers hardness measurements (KB3000BVRZ-SA, Shanghai Everone Precision Instruments Co., Ltd., China). Diamond paste was used to grind... samples synthesized at the optimal sintering temperatures. The results shown in Table 4 indicate that the contents of Cu and Cr in the leaching solution were lower than the detection limit. A small amount......
层的强度极限时,铝层开始颈缩并产生裂纹,同时界面裂纹沿拉伸方向迅速扩展,随后IF钢单独伸长变形直至断裂.王传杰等[12]研究了Cu/Ni复合箔的界面变形行为,基体层间的力学性能差异导致Cu/Ni界面的微孔缺陷处最先萌生裂纹,当界面裂纹大量合并和纵向扩展时,基体层开始发生颈缩和断裂.皇涛等[13]通过扫描电镜表征研究了钛/铝复合板原位拉伸加载过程的损伤演化行为,裂纹在复合界面区的金属间化合物层中萌生...]. Journal of Alloys and Compounds, 2003, 361(1/2): 138-143. [3] CHEN Gang, LI Jin-tao, XU Guang-ming. Bonding process and interfacial reaction in horizontal twin-roll casting of steel/aluminum clad......
MBAM和WC–8%(质量分数)Co(YG8)复合粉,在分散剂Solsperse-6000 (ICI Co. USA)的作用下制备了固相体积分数为51%的浆料,最后在甲基甲苯胺(Methyltoluidine)和过氧化苯甲酰(Benz peroxide)的催化和引发下,制备了YG8坯体.干燥后在1 400 ℃下真空烧结2 h,制得WC-8%Co硬质合金,与传统硬质合金生产工艺(如干压成型或注射成型)所制备的产品相比,其性能相差不大.图5所示为他们采用凝胶注模成型技术制备的WC-8%Co硬质合金维拉斯像[70]. 图5 采用凝胶注模成型技术制备的WC-8%Co硬质合金维拉斯像[70] Fig.5 Venus portraits prepared by gelcasting of WC-8%Co: (a) Green body; (b) Sintered......
光照射条件下,阳极氧化所合成有序排列TiO2纳米管阵列薄膜的光裂解水现象.利用TiO2纳米管阵列薄膜组成的光电化学电池在紫外光照射下裂解水制氢量达960 μmol/(h?W),转换效率为6.8%.2006年,PARK等[65]利用具有高比表面积的碳掺杂改TiO2纳米管阵列在太阳光照射下裂解水制氢.实验表明:碳掺杂改性后的TiO2纳米管阵列在太阳光照条件下具有强化的裂解水分子的能力,光电流密度高于纯...): 14-18.HUANG Mian-feng, ZHENG Zhi-xiang, XU Guang-qing, WU Yu-cheng. Preparation and visible-light activity of N, S-co-doped nano-TiO2 photocatalys[J]. Transactions of Materials and Heat Treatment......
放效率的空间十分有限,在此限制没有突破之前,锂离子电池正极材料容量的提高已成为当前和今后一个时期锂离子电池研究的重点领域和突破口.获得高容量的一种有效方式是寻找高价态的氧化物,如钒,鉻,铌和钼等,这是因为氧化还原时这些氧化物可以嵌入多个Li+离子,发生多个价态的变化[12],有助于获得较大的比容量.但是,因为W和Nb等本身的元素较重,其比放电容量并没有得到真正提高.Mo氧化物中单个Mo虽可以嵌入1.5 个Li+离子,但是其活性较差.图2所示为目前已商品化和正在研发的主要正极材料容量和工作电压分布图.由图2可见,锰基和钒基正极材料是目前重点关注的两大体系. 锰基正极材料,如掺Ni形成的LiNi0.5Mn1.5O4,其Li+离子嵌入基体的电压平台达到4.8 V,是开发高电压平台较好的例子[13],但该系材料容量明显偏低,只有140 mA?h/g (C/7).钒基正极材料,如V2O5和......
亲和力递减顺序依次为Zr,Ti,Nb,V,W,Mo,Cr,Mn,Fe,Co和Ni.由于镀覆材料与金刚石的热膨胀系数不同,金刚石与形成的碳化物之间存在较大的热应力,在W,Ti,Cr,V,Nb,Mo,Ta和Zr形成的碳化物中,Cr3C2的热应力值最大,而NbC的最小[37].同时,多层碳化物层能有效降低金刚石与碳化物之间的热应力.金刚石表面的金属或金属化合物分为3层,从内到外分别为:第一层是碳化物层...,Co和Cu,美国专利提出Ni-W和Co-W等一系列复合镀[40].其中Ni,Cu和Co等石墨化元素不适合作金刚石线锯中金刚石金属表面化处理的电镀元素[40].一方面,这是由于当低温或中温化学镀再电镀的Ni-W或Co-W等合金在烧结时,金刚石表面石墨化,使碳化物生长在金刚石表面的石墨层上,导致金刚石与碳化物不能直接结合,达不到化学结合的效果；另一方面,这是由于高温化学镀再电镀虽能使金刚石与碳化物化学结......
oxide, tin is the major impurity in recovery process of indium metal from ITO target-scrap. In addition to unused ITO target, various impurity metals including Al, Mo, Fe, Ni, and Cr are contaminated... and the thermodynamic properties. 2 Experimental 2.1 Materials and methods ITO target-scrap was obtained from the Uctend Co., Ltd., (Shanghai, China). The displayed sample was crushed......
)混合盐电解液对Li(Ni1/3Mn1/3Co1/3)O2/石墨电池性能的影响,发现与1 mol/L LiPF6电解液相比,LiTFSI的存在降低了电池电荷转移阻抗及自放电率,减少了高温存储下的析气量,对电池高低温性能均有一定改善.但是,当充电电压高于4.45 V时,电解液中Ni,Mn,Co金属离子含量升高,说明LiTFSI会加剧过渡金属溶解.车海英等[58]研究三氟甲基磺酰亚胺锂盐(LiTFSI... batteries; past 10 years and the future[J]. Journal of Power Sources, 2001, 100(1): 101-106. [4] MIKHAYLOV A A, MEDVEDEV A A, MASON C W, NAGASUBRAMANIAN A, MADHAVI S, BATABYAL S K, ZHANG Q, GUN J......
Trans. Nonferrous Met. Soc. China 29(2019) 143-156 High performance room temperature gas sensor based on novel morphology of zinc oxide nanostructures Naila ZUBAIR, Khalida AKHTAR National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar-25120, Khyber Pukhtoonkhwa, Pakist......
