scholarly journals Electromagnetic measurement of level and conductivity of non-ferrous metals

2020 ◽  
pp. 63-68
Author(s):  
G. L. Losev ◽  
◽  
V. A. Eltishchev ◽  
Keyword(s):  
Electrical Conductivity ◽  
Alkali Metals ◽  
Measurement Accuracy ◽  
Non Invasive ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Electromagnetic Measurement

The paper presents the developed electromagnetic non-invasive level and electrical conductivity sensors for non-ferrous and alkali metals. The influence of the geometry of the installations on the measurement accuracy was experimentally determined. The limits of permissible errors in the positioning of the sensors relative to the analyzed volumes of metals are established.

Wear behaviour of metals in dry sliding against molybdenum with current collection

2020 ◽  
pp. 118-125
Author(s):  
M. I. Aleutdinova ◽  
V. V. Fadin
Keyword(s):  
Electrical Conductivity ◽  
Electrical Contact ◽  
Wear Behaviour ◽  
High Wear Resistance ◽  
Dry Sliding ◽  
High Electrical Conductivity ◽  
Current Collection ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Sliding Electrical Contact

The possibility of high electrical conductivity of dry sliding electrical contact against molybdenum counterbody was studied. It was found that metals W and Cu were not able to form a sliding electrical contact with high wear resistance at current density higher 100 A/cm2 . The characteristics of the contacts of iron containing metals were slightly better than the contact characteristics of non-ferrous metals due to weaker adhesion. Using X-ray phase analysis, it was shown the absence of oxides in the sliding zone of non-ferrous metals. This led to their strong wear and contact’s low electrical conductivity. In the contact zone of iron containing samples the formation of FeO was observed that made it possible to reduce wear. This means that high electrical conductivity is unattainable in sliding with current collection against molybdenum.

Sign in / Sign up

Export Citation Format

Share Document