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涡流纺生产工艺优化 被引量:10
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作者 刘建林 马金华 +1 位作者 陈水香 傅春花 《河南工程学院学报(自然科学版)》 2021年第2期20-23,共4页
通过加强操作管理和优化工艺,如梳棉工序采用6S工艺中的重定量配置、并条工序减少并合根数、降低总牵伸倍数与牵伸不匀率、提高纤维伸直平行度、严格控制温湿度,可使村田870 EX型涡流纺纱机速度达到540 m/min,生产效率为99%左右,每台机... 通过加强操作管理和优化工艺,如梳棉工序采用6S工艺中的重定量配置、并条工序减少并合根数、降低总牵伸倍数与牵伸不匀率、提高纤维伸直平行度、严格控制温湿度,可使村田870 EX型涡流纺纱机速度达到540 m/min,生产效率为99%左右,每台机器的R19.7 tex纱产量达到60 kg/h以上。 展开更多
关键词 涡流纺 工艺 优化 车速
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Preparation and Characterization of Core-Shell MoSi_(2)@Nb Materials Sintered by SPS
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作者 Luo Jiajun Quan Ciwang +5 位作者 Zhang Jianjun chen shuixiang Zhang Xitong Han Mengyao Liang Bingliang chen Weihua 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2024年第11期3053-3063,共11页
Core-shell MoSi_(2)@Nb powder was prepared by electrostatic layer self-assembly method.The surfactants SDS(CHSO_(4)Na)and CTAB(C_(19)H_(42)BrN)were used to modify the surface of the two particles to make them charged,... Core-shell MoSi_(2)@Nb powder was prepared by electrostatic layer self-assembly method.The surfactants SDS(CHSO_(4)Na)and CTAB(C_(19)H_(42)BrN)were used to modify the surface of the two particles to make them charged,and the Zeta potential of the suspension was tested by the Zeta potentiometer.Scanning electron microscope,transmission electron microscope and energy dispersive spectrometer were used to characterize the phase,morphology,microstructure and element distribution of synthetic materials.The results show that when the SDS concentration is 2 mmol/L,the CTAB concentration is 3mmol/L and the pH value of Nb suspension is 5,the coating effect is better after secondary cladding.NbSi_(2)phase is found at the interface between Nb and MoSi_(2)after calcination at 200℃ for 2 h in Ar atmosphere,indicating that Nb is highly active and reacts with Si.Core-shell structure is still retained in MoSi_(2)@Nb material after spark plasma sintering at 1450℃ for 2 h under uniaxial pressure of 40 MPa.However,it is found that Nb reacts strongly with MoSi_(2),and most of the Nb phase is reacted.This issue needs to be addressed in subsequent studies.The fracture toughness(K_(IC))of MoSi_(2)@Nb material is significantly improved to 5.75 MPa·m^(0.5)compared with that of MoSi_(2)material(3.32 MPa·m^(0.5)). 展开更多
关键词 core-shell structure electrostatic layer self-assembly spark plasma sintering fracture toughness
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