Molybdenum carbide and nickel-molybdenum carbide catalysts were prepared by temperature-programmed reduction using a CH_4/ H_2 gas mixture to carburize molybdenum trioxide and nickel-molybdenum oxide. X-ray diffraction patterns showed that the crystals were(β-Mo_2C) and Ni-Mo_2C, respectively. 将MoO3和Ni-Mo混合氧化物在CH4/H2气氛中程序升温还原碳化制备了相应的碳化钼和碳化镍钼催化剂,X射线粉末衍射表征其物相分别为-βMo2C和Ni-Mo2C。
Measuring retained austenite of carburize layer of low carbon alloys with X-ray diffraction method X射线衍射法测定渗碳钢中残余奥氏体
Temperature and atmosphere parameter collection and intelligent control technique in carburize are its research object. 本文以渗碳过程中温度和气氛等参数的采集和智能控制技术为研究对象,综合应用了嵌入式技术、计算机控制技术、网络技术、模糊PID控制理论等知识。
Vacuum sintering and carburize reaction of hardmetals 硬质合金的真空烧结与渗碳反应