A brief presentation onMetallic Glasses for pressure sensors Course: Advanced Materials and Processes Vinit Murmu 09MT3017 Piyush Verma 09MT3018 Department of Metallurgical and Materials Engineering IIT Kharagpur
About Electromagnetic Pressure Sensors These Pressure sensors uses diaphragm, conventional is stainless steel (made by cold forging) . Measures the displacement of a diaphragm by means of changes in inductance.
BMG Diaphragm By Vapour deposition at low temperature•Increased sensitivity of the sensor by having alower young’s modulus and high strengthmaterial.•BMG meets this requirement.•BMGs diaphragm of sensors are made by liquidforging techniques.•Zr55Al10Ni5Cu30 have Young modulus 100GPa,half of steel, and sensitivity 3.8 times that ofstainless steels
Relationship between Youngs modulus and strengthRecent progress of bulk metallic glasses for strain-sensing devices. N. Nishiyama ,K .Amiya, A. Inoue
CMF-Coriolis Mass FlowmeterRecent progress of bulk metallic glasses for strain-sensing devices. N. Nishiyama ,K .Amiya, A. Inoue
• Comparison of sensitivity of Ti41.5Zr2.5Hf5Cu42.5Ni7.5Si1 and conventional SUS316L pipe. • Linear correlation coefficients of the data are evaluated to be 0.9997 for Ti-based BMG and 0.997 for conventional pipe. • BMG alloy found to be 28 times more sensitiveRecent progress of bulk metallic glasses for strain-sensing devices. N. Nishiyama ,K .Amiya, A. Inoue
New sensors based on the magnetoelastic resonance of metallic glasses A magnetoelastic material changes its dimensions when it is exposed to a magnetic field. We present the response of ME resonators based on amorphous ferromagnetic ribbons to the position of a moving magnet which produces a field varying largely in the ribbon dimensionsNew sensors based on the magnetoelastic resonance of metallic glasses. J.M.Barandiaran, J. Gutierrez, C. Gomez-Polo
Experimental 8-cm-long strips of Metglas® 2605SC amorphous alloy (iron-based composition) saturation magnetostriction, λs=30×10−6 spontaneous magnetization, Js=1.61 T• Field-annealed for 10 min at 390°C under an static field H=0.45 T (gives rise to stripe domain structure that maximizes their magnetoelastic response.)
For the first peak a strong linearbehaviour of fr1 and A has beenobserved when the magnet isdisplaced from/to the center of thesample.
Conclusions For the first peak a strong linear behaviour of fr1 and A1 has been observed when the magnet is displaced from/to the center of the sample. An almost constant signal with a low variation of the resonant frequency is observed when the magnet is located close to one end of the sample.
Possible Applications In any case these effects can be used to detect the presence of inhomogeneous fields and to sense the variation of other quantities which can be converted into such fields. The direct use of the magnet or the interposition of a soft magnetic material can be used in proximity sensors.