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"和平2"号[15-16].质量各为19 t.它们是仅有的2艘用马氏体Ni钢来制造载人球壳的潜水器,其Fe-Ni电池所供的总能量为美国"海涯(Seacliff)"号和法国"鹦鹉螺"号的2倍,水下总时间长达17~20 h,水下瞬时航速高达5节,潜水器垂直潜浮速度可从每分钟几厘米到每分钟35~40 m,并备有高分辨率的主体摄像系统；配有两只多自由度机械手及一套取样装置,还带有12套检测深海环境参数和海底...,载人潜水器可以在任何深度实现均衡.对于一体化推力器来说,发展方向是降低噪声,目前我国自行研制的一体化推力器的噪声水平已经明显地低于美国Technadyne公司的产品. 潜水器的水动力特性和自动控制相结合就构成了载人潜水器的控制系统,在"蛟龙号"载人潜水器上,
大挑战.WEI等[22-23]最近报道了通过W-C梯度过渡层阻碍金属粘结相Co的扩散,成功地在WC-Co硬质合金基体上沉积了高质量微米和纳米金刚石薄膜. Fe元素与Co元素对CVD金刚石生长具有十分类似的抑制作用.本文作者以高速钢为基体,采用反应磁控溅射技术在钢基上制备W-C梯度层作为中间过渡,试图利用该过渡层隔离钢基体中的Fe,从而阻碍钢基中Fe的石墨化作用和C在Fe中溶解和扩散,同时希望强碳型... on nanocrystalline diamond films deposited on WC-13wt.% Co substrate with W-C gradient layer[J]. Applied Surface Science, 2009, 256(5): 1322-1328. [24] PALMQUIST J P, CZIGANY Z, ODEN M, NEIDHART J......
composites obtained from reactive metal penetration of commercial aluminium alloys into cordierite [J]. Composites Part A, 2010, 41: 639-645. [12] CHEN M Y, BRESLIN, M C. Friction behavior of co...Trans. Nonferrous Met. Soc. China 22(2012) 2913-2924 Experimental study and numerical analysis on dry friction and wear performance of co-continuous SiC/Fe-40Cr against SiC/2618 Al alloy composites......
410083, China; 3. Suzhou Longray Thermal Technology Co. Ltd., Suzhou 215008, China Received 11 September 2012; accepted 29 February 2013 Abstract: According to the features of melting process... alloys are widely used in the economy, particularly in the transportation, packaging and construction industries. Most aluminum melting is accomplished in large, natural-gas-fired furnaces. Although......
. For the composition design, some metal, metalloid and gas elements (Ti, B, S, Si, Cr, F, W and N) are added into the coating to improve the properties. For example, to improve thermal stability of the DLC... on nanostructured coatings almost covered all the coating materials, including some soft film lubrication material, such as MoS2 [44], traditional hard metal coating material, such as Cr, Ni [45,46......
, LU W, WU J, GUAN J G. Microwave dielectric properties of Li2TiO3 ceramics sintered at low temperatures[J]. Materials Science and Engineering B, 2011, 176: 99-102. [12] 张丽芬, 陈白珍, 石西昌, 马立文, 陈 亚. 偏钛酸型锂... in Li2TiO3[J]. Journal of Nuclear Materials, 2007, 367/370: 1398-1403. [18] SUZUKI S, KOBAYASHI M, KURATA R, WANG W, FUJII T, YAMANAB H, FENG K, OYA Y, OKUNO K. Elucidation of annihilation processes......
diamond films on the interior hole surfaces of Co cemented tungsten carbide substrates [J]. Diamond and Related Materials, 2009, 18: 276-282. [2] WHEELER D W, WOOD R J K, HARRISON D, SMITH E... of temperature on nanocrystalline diamond films deposited on WC-13wt.%Co substrate with W-C gradient layer [J]. Applied Surface Science, 2009, 256: 1322-1328. [14] SCHWARZ S, ROSIWAL S M, FRANK M, BREIDT......
的金属离子还原为金属并沉积在基体表面上,形成镀层的化学镀表面修饰方法最为常见.如通过化学镀方法对CNTs表面进行镀Cu[24-25],Ni[26-27],W[28],Mo[29]等金属,得到连续,均匀,光滑,致密的镀层,优化了CNTs与基体的界面结合. 2 CNTs-金属复合粉末的制备 由于CNTs和金属基体之间存在较大的密度差,如多壁碳纳米管的密度(1.8~2.1 g/cm3)仅为铜....HE等[37]采用沉积-沉淀法在铝粉基体上获得均匀分散的活性Ni纳米颗粒,以该Ni-Al粉末为催化剂,利用化学气相沉积法原位合成形态好,纯度高,分散均匀的CNTs,获得CNTs(Ni)-Al复合粉末. 3 CNTs-金属复合块体材料的制备 制备CNTs增强金属基复合材料首先应该考虑的问题是CNTs在金属基体中的分散性以及与基体的结合性.目前,通常采用的方法主要有粉末冶金烧结法......
with face- centred cubic systems, especially in aluminium alloys (Al-Li-Cu, Al-Mn-Si, Al-Ni-Co, Al-Pd-Mn, Al-Cu-Fe, Al-Cu-V), but many other compositions (Cd-Yb, Ti-Zr-Ni, Zn-Mg-Ho, Zn-Mg-Sc, In-Ag-Yb...:citation w:st="on">{111} surface planes develop orthogonal to the direction of the original 20 C-H bonds by sequential H abstraction and CH3 addition reactions. IDC can be pictured......
): 77-83. [69] CHEN J, HOU G, CHEN J, AN Y L, ZHOU H D, ZHAO X Q, YANG J. Composition versus friction and wear behavior of plasma sprayed WC- (W, Cr)2 C-Ni/Ag/BaF2-CaF2 self-lubricating composite coatings...SiO2,Cr3C2,Cr2O3,Cr2O3)发生了变化,但是润滑相(Ag和BaF2/CaF2共晶体)始终没发生改变.例如,性能最优益的第四代PS400高温固体润滑涂层的摩擦学性能见表2.此外,最近报道的还有WC-(W,Cr)2C-Ni-Ag-BaF2/CaF2涂层[69](见表2). 3.4 Ag同时与多种润滑组元协同润滑的硬质涂层 协同润滑是指单一固体润滑剂加入一种(或几种)固体润滑剂(甚......
