Effect of ytterbium on the properties of Magnico alloys

Conclusions The addition of 0.3% Yb to an alloy of the Magnico type alloyed with 0.9% Si, 0.5% Nb, and 0.2% Ti increases the maximum magnetic energy to 24 kJ/m³ and reduces the quantity of harmful impurities, which substantially improves the grindability of the alloy.Novocherkassk Scientific-Research Institute of Permanent Magnets. Translated from Metallovedeme i Termicheskaya Obrabotka Metallov, No. 7, pp. 49–50, July, 1976.     

Diffusion saturation of alloy YuNDK24 with carbon

Metal Science and Heat Treatment -     

Resistance to brittle failure of high tempered steels with initial martensitic and bainitic structures

Metal Science and Heat Treatment -     

Tribological Wear-Preventive Coatings

Journal of Machinery Manufacture and Reliability - This article discusses wear-preventive tribological coatings that increase the operational life of artillery, tank, and rifle barrels. Studies...     

Stable Turning of Fluoroplastic Workpieces

Russian Engineering Research - Instability of the system in the machining of fluoroplastic is investigated. The influence of the cutting conditions and preliminary workpiece preparation on the...     

Realizing simultaneously enhanced energy and power density fullcell construction using mixed hard carbon/Li_4Ti_5O_(12) electrode

Practical applications of lithium-ion batteries(LIBs) with both high energy and power density are urgently demanded,which require suitable charge/discharge platform,fast charge-transfer kinetics,as well as optimal solid electrolyte interphase(SEI) layer of electrode materials.In this work,a high-performance lithium-ion battery(LIB) full cell was assembled by using commercial LiNi_(0.33)Co_(0.33)Mn_(0.33)O_2(NCM111) as the positive electrode and mixed Li_4 Li_5 O_(12)(LTO)/hard carbon(HC) as the negative electrode.It reveals that the component ratio between LTO and HC plays a critical role in manipulating the electric conductivity and the electro-reaction platform.The electrochemical test results show that when the content of HC is 10 wt%,the as-constructed full cell demonstrates the best electrochemical,with a maximum energy density of 149.2 Wh·kg~(-1) and a maximum power density of2195 W·kg~(-1) at 10 A·g~(-1)(30 C).This outperforms all the assembled systems within our work range and the state-ofthe-art literatures.The NCM//Li_4 Ti_5 O_(12)+10 wt% HC battery system also exhibits a good capacity retention after1000 cycles at the current density of 1 A·g~(-1).This work provides a new approach to enhance the full-cell performance by mixing electrode materials with different charge potentials and reaction kinetics.     

山区弱电系统的接地设计与降阻措施探讨

通过对山区弱电系统在接地上普遍存在的土壤电阻率高,可用场地小,地势险峻、地形复杂等因难因素的分析;讨论了山区弱电系统在接地设计和降阻改造的措施。提出了综合地利用自然接地体,在适当地区设置外延接地及沿道路外延降阻方法。通过分析、讨论认为只要充分采取合理、有效的降阻措施,是能够有效降低山区弱电系统的接地电阻,保证弱电系统安全运行。     

超薄氧化层的电击穿特性

本文在测试分析N 理层—隧道氧化层一多晶硅电容（N OP电容）、P衬底一隧道氧化层一多晶硅电容（POP电容）和EEPROM单元隧道氧化层电容（TOP电容）的I－V特性、I－t特性、V－t特性的基础上,对隧道氧化层的击穿特性进行了理论分析,并提出了提高隧道氧化层可靠性的具体措施。     

基于PS021的无线应变测量系统研究

基于应变的测量需求越来越多,本文针对传统的应变测量系统的各种弊端,设计了基于TDC的应变测量系统。本文利用基于TDC技术(时间数字转换器)的PS021芯片来设计应变测量系统。在数据传输方面,对比了常用的数据传输技术,最终采用基于微功射频技术的NanoPAN5375来搭建无线数据传输系统。