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Source and hazard identification of heavy metals in soils of Changsha based on TIN model and direct exposure method CHEN Jian-qun1, WANG Zhen-xing2, WU Xie3, ZHU Jian-jun1,2, ZHOU Wen-bin1 1... and triangulated irregular network (TIN) model was successfully employed to discriminate sources, simulate spatial distributions and evaluate children’s health risks of heavy metals in soils......
,已有大量的相关研究被报道[11-21].HAUBNER等[21]采用多种工业中常用的PVD涂层(CrN,TiAlN,TiCN,TiN和WC/C)作为中间过渡层,并研究比较了各过渡层对金刚石形核,生长以及C扩散的影响.发现金刚石的形核率均较低,没有得到致密的金刚石涂层.这些中间过渡层若想进行工业应用,仍然需要进一步提高金刚石薄膜的形核率和结合强度. 表面渗碳长期以来都是CVD金刚石膜涂层钢基材料的一..., HULTMAN L, JANSSON U. Magnetron sputtered W-C films with C60 as carbon source[J]. Thin Solid Films, 2003, 444(1/2): 29-37. [25] MASSALSKI T, OKAMOTO H. Binary alloy phase diagrams[M]. Materials Park, Ohio......
and aluminum alloy industry (3) [J]. Aluminum Processing, 2006(1): 1-7. [21] 敖 宏, 邓 超. 全球化大背景下我国资源型企业发展战略的完善[J]. 中央财经大学学报, 2008(10): 67-71.AO Hong, DENG Chao. Improvement of resource enterprise......
B, CHAUYEAU T, CHAUBET D, CASTELNAU O. Texture evolution and associated nucleation and growth mechanisms during annealing of a Zr Alloy [J]. Metallurgical and Materials Transactions A, 2009, 40......
high-carbon ferrochrome alloy powder[D]. Changsha: Central South University, 2009: 18-22. [36] 郑诗礼, 张 洋, 徐红彬, 肖清贵, 张 懿. 一种铬铁矿液相氧化生产铬酸钠的清洁生产方法: 中国, CN 102001708A[P]. 2011-04-06. ZHENG Shi-li, ZHANG......
石表面镀覆金属或合金使其具有金属性能,其原理如下:金刚石表面与强碳化物形成元素在合适的工艺条件下将产生强烈的界面反应生成碳化物层.镀覆的金属及合金主要有Ti,W,Cr,Mo,TiN和NiWB等[48].国外从20世纪70年代末开始研究金刚石表面金属化技术,国内金刚石表面金属化技术由林增栋[49]研究成功并取得中国发明专利.此后,不少学者在这方面做了许多研究工作.金刚石表面金属化的方法主要有化学镀... and development of high silicon aluminium alloy for light weight electronic package materials[J]. Materials Review, 2004, 18(6): 79-82. [5] 邹爱华. 电子封装 SiCp/Al 复合材料热导率研究[D]. 南昌: 南昌航空工业学院, 2007.ZOU Ai-hua......
, the slip between die and tube would increase the risk of wrinkling. On the contrary, too large friction would cause tube material flow difficulties, which would lead to wall thickness variation and cross... of the nitriding treatment. The WC/C cermet thin film materials as well as TiN, CrC, Al2O3, TiAlN, DLC had been widely used in plastic forming with the development of most vacuum deposition techniques......
] Fig. 1 Process comparative figure of microwave and vacuum sintering of WC-8Co alloy[6] 2.2 微波与烧结材料的作用机制 由于不同材料对微波的感应机制和吸收程度不同,因此根据材料和微波之间的耦合关系将材料分为[32]吸波材料,透波材料和反射材料,但是这样的划分并不是绝对的,因为材料的吸波特性...: Central South University, 2010. [54] 周承商. 微波烧结W-Ni-Fe高密度合金研究[D]. 长沙: 中南大学, 2009. ZHOU Cheng-shang. Research on microwave sintering of W-Ni-Fe high density alloy[D]. Changsha: Central South University......
Introduction Interest in alloy and cermet materials for fabricating inert anodes for use in industrial aluminum electrolysis has increased in recent years because of their significant advantages in terms......
;Schematic diagram of binder damage in multi-ligament zone of WC-Co alloy[24] 2.1 裂纹断裂路径 在研究合金断裂机理的过程中,很多研究者都同时研究其断裂路径.GURLANA[25]认为无论是低Co还是高Co合金,断裂都有避开Co相的倾向,多发生在碳化物相和WC-WC边界上.当WC晶粒尺寸不超过1~2 μm时,裂纹仅分布在...带中也会出现微孔和空洞[31].钝的裂纹尖端和内部孔隙的长大和合并会导致韧带破裂,裂纹失稳.韧带区的长度大致为合金碳化物平均自由程的5倍,EVANS等[32]将其称为多韧带区. 图2 WC-Co裂纹传播路径[28] Fig. 2 Crack propagation path of WC-Co alloy[28] 2.2 硬质合金的疲劳裂纹扩展模式 硬质合金的疲......
