材料期刊网

Antimony Induced Crystallization of Amorphous Silicon

Y. Wang , H.Z. Li , C.N. Yu , G.M. Wu , I. Gordon , P. Schattschneider , O. Van Der Biest , null , null , null , null , null , null , null , null , null , null

金属学报(英文版)

Antimony induced crystallization of PVD (physics vapor deposition) amorphous silicon can be observed on sapphire substrates. Very large crystalline regions up to several tens of micrometers can be formed. The Si diffraction patterns of the area of crystallization can be observed with TEM (transmission electron microscopy). Only a few and much smaller crystals of the order of 1μm were formed when the antimony layer was deposited by MBE (molecular beam epitaxy) compared with a layer formed by thermal evaporation. The use of high vacuum is essential in order to observe any Sb induced crystallization at all. In addition it is necessary to take measures to limit the evaporation of the antimony.

关键词: antimony , null , null , null

Thermodynamic Properties of FeCN and FeCBN Melts

CHEN Erbao , WANG Shijun , DONG Yuanchi , WU Baoguo , ZHOU Yun

钢铁研究学报(英文版)

The saturated solubility of carbon and nitrogen in FeCN and FeCBN melts was measured experimentally at 1 485 ℃ to obtain the activity interaction coefficients between components in these melts. A new method was used to treat experimental results. Using thermodynamic derivation and calculation, some important interaction coefficients between components in these melts were obtained.

关键词: FeCN melt;FeCBN melt;FeCB melt;interaction coefficient;thermodynamic property

B-C-N材料的合成

李阿丹

物理测试 doi:10.3969/j.issn.1001-0777.2006.02.006

本文介绍了六方及立方B-C-N合成的理论基础和近年来人工合成B-C-N新材料的方法、合成产物的结构及其物理化学特性,介绍了笔者采用化学法合成B-C-N化合物的方法,提出了今后的发展方向.

关键词: B-C-N , 六方结构 , 性质

钛铁矿制备Ti(C,N)粉C/N的控制研究

陈敏 , 汤爱涛 , 刘胜明 , 赵子鹏 , 王健 , 刘传璞

功能材料 doi:10.3969/j.issn.1001-9731.2013.15.031

以钛铁矿和石墨为原料,在N2气氛下通过碳热还原法制备了粒度均匀的微米Ti(C,N)粉.结合X射线衍射分析,主要研究了Ti(C,N)粉制备过程中配碳量、反应温度、保温时间、N2分压对C/N的影响规律,获得了C/N控制关键因素及量化控制参数.

关键词: 钛铁矿 , 碳氮化钛 , 碳热还原 , 晶格常数

Amorphous B-C-N semiconductor

Journal of Applied Physics

Amorphous BC2N powders were prepared by mechanical milling with hexagonal boron nitride and graphite as starting materials. A bulk amorphous BC2N compound was produced by sintering the as-milled amorphous BC2N powders in a vacuum of 10(-5) Torr at a temperature of 1470 K. The conductivity measurement for the bulk amorphous BC2N compound showed that it behaves as a semiconductor with band gap energy of 0.11 eV for temperatures ranging from room temperature to 560 K and a semimetal for temperatures between 560 and 740 K. The mechanism of the formation of the amorphous BC2N powders is discussed. (C) 1998 American Institute of Physics.

关键词: bc2n

纳米Ti(C,N)增强Ti(C,N)基金属陶瓷的制备研究

徐智谋 , 易新建 , 胡茂中 , 徐尚志

无机材料学报

采用Ti(C,N)纳米粉末制备Ti(C,N)基金属陶瓷.研究了烧结温度、保温时间和升温速度等工艺参数对含10wt％纳米粉末的Ti(C,N)基金属陶瓷性能的影响,得到优化烧结工艺为1450℃,保温75min,升温速度3℃/min.用优化工艺制备的Ti(C,N)基金属陶瓷抗弯强度提高了约36.7％,增强机理主要表现为细晶强化、弥散强化和固溶强化.

关键词: 纳米粉末 , Ti（C , N）-based cermets , properties , reinforcing mechanisms

纳米Ti(C,N)增强Ti(C,N)基金属陶瓷的制备研究

徐智谋 , 易新建 , 胡茂中 , 徐尚志

无机材料学报 doi:10.3321/j.issn:1000-324X.2003.06.011

采用Ti(C,N)纳米粉末制备Ti(C,N)基金属陶瓷.研究了烧结温度、保温时间和升温速度等工艺参数对含10wt%纳米粉末的Ti(C,N)基金属陶瓷性能的影响,得到优化烧结工艺为1450℃,保温75min,升温速度3℃/min.用优化工艺制备的Ti(C,N)基金属陶瓷抗弯强度提高了约36.7%,增强机理主要表现为细晶强化、弥散强化和固溶强化.

关键词: 纳米粉末 , Ti(C,N)基金属陶瓷 , 性能 , 增强机理

纳米Ti(C,N)增强Ti(C,N)基金属陶瓷的研究

徐智谋 , 易新建 , 胡茂中 , 徐尚志

材料热处理学报 doi:10.3969/j.issn.1009-6264.2003.03.009

采用纳米Ti(C,N)粉末制备Ti(C,N)基金属陶瓷,研究了纳米粉末对金属陶瓷组织及性能的影响.结果表明,粉末冶金过程中,纳米Ti(C,N)粉末易于在粘结相中扩散与溶解及沿晶界分布,降低了硬质相在粘结相中的溶解度,抑制了晶粒长大,提高了材料的红硬性能.抗弯强度与晶粒尺寸满足于Hall-Petch公式,5wt%～10wt%的纳米粉末加入量可使金属陶瓷的抗弯强度和切削性能得到较大的提高,但硬度变化不大.切削磨损主要表现为磨粒磨损和轻微的粘着磨损,磨痕细小均匀.

关键词: 纳米Ti(C,N)粉末 , Ti(C,N)基金属陶瓷 , 组织 , 性能

STRAIN INDUCED PRECIPITATION OF Ti(V)N(C)IN HIGHCARBON STEEL

FANG Shufang , ZHANG Jian Panzhihua Institute of Iron and Steel Research , Panzhihua , China Laboratory of Physics , Panzhihua Institute of Iron and Steel Research , Dukou City , 617000 Sichuan , China

金属学报(英文版)

The precipitation of Ti(V)N(C)in high-carbon steel PD_3 during thermomechanicol treatment at austenitic temperatures after deformation has been observed.The average size of Ti(V)N(C)particles may reduce with the increase of strain and the decrease of thermomechanical treatment temperature,and vise versa.The growth of Ti(V)N(C)particles at 920°C is found to be controlled by the interface reaction between precipitated particles and matrix.

关键词: Ti(V)N(C) , null , null

Ti(C,N)材料的研究进展

胡文斌 , 张龙 , 王建江 , 谢志学 , 程勇 , 娄鸿飞

材料导报

分别介绍了Ti(C,N)陶瓷材料、Ti(C,N)基金属陶瓷材料和Ti(C,N)基复相陶瓷材料的组织结构、性能、优势及其制备方法.Ti(C,N)陶瓷材料的制备方法主要有气相沉积法、激光熔覆法和自反应喷涂法,Ti(C,N)基金属陶瓷材料的制备方法主要有粉末冶金法和自蔓延高温合成法,Ti(C,N)基复相陶瓷材料的制备方法主要有自反应喷射成形法和自反应喷涂法.最后介绍了Ti(C,N)材料的应用及其应用的局限性.

关键词: Ti(C,N) , 金属陶瓷 , 制备方法 , 应用