Metallic glass ingots based on yttrium

Abstract

We report a family of yttrium metallic alloys that are able to form glassy ingots directly from the liquid, as well as forming bulk-sized amorphous rods with diameters over 2 cm by water cooling of the alloy melt sealed in quartz tubes. It is apparent that, in addition to the strong chemical interaction among the components, the simultaneous occurrence of well-distributed atom sizes and a strongly depressed liquidus temperature in multicomponent metallic alloys is responsible for the formation of glassy ingots.

Formation and Properties of New La-Based Bulk Glassy Alloys with Diameters up to Centimeter Order

“…Very recently, Ln-based glassy alloy rods with diameters of over one centimeter were fabricated. However, the new bulk glassy alloys exhibited narrow ÁT x which were below 45 K. 23,24) In this paper, we report on the formation, stabilization of supercooled liquid and mechanical properties of a new series of Ln-based glassy alloys in the La-Al-Cu-Ag and La-Al-CuAg-(Co,Ni) systems, which show the critical diameters range from 6 to 12 mm, low T g of 398-425 K, large ÁT x of 65-96 K and high fracture strength of 640-858 MPa with plastic strain of $0:4%.…”

“…19) In addition, the ÁT x is also an importent parameter that interprets GFA of bulk glassy alloys. 20) Recently, the Ln-based bulk glassy alloys have gained considerable interest again because the glassy alloys have lower T g , 21) large ÁT x , 21) high GFA, [22][23][24] low melting temperature, 25) good mechanical properties, 24,26) and hard magnetic properties. 22) It is important for scientific and engineering aspects to develop a new Ln-based glassy alloy with higher GFA and larger ÁT x .…”

Applications in the Nuclear Industry for Corrosion-Resistant Amorphous-Metal Thermal-Spray Coatings

“…One of the most promising formulations within this family was found to be Fe 49. 7 Cr 17.7 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 (SAM2X5), which included chromium (Cr), molybdenum (Mo), and tungsten (W) for enhanced corrosion resistance, and boron (B) to enable glass formation and neutron absorption [11][12][13][14][15]. The parent alloy for this series of amorphous alloys, which is known as SAM40 and represented by the formula Fe 52.3 Cr 19 Mn 2 Mo 2.5 W 1.7 B 16 C 4 Si 2.5 , has less molybdenum than SAM2X5 and was originally developed by Branagan [16][17].…”

“…Examples included: thermally sprayed coatings of Fe-10Cr-10-Mo-(C,B), bulk Fe-Cr-Mo-C-B, and Fe-Cr-Mo-C-B-P [4][5][6]. The corrosion resistance of an Fe-based amorphous alloy with yttrium (Y), Fe 48 Mo 14 Cr 15 Y 2 C 15 B 6 was also been established [7][8][9]. Yttrium was added to this alloy to lower the critical cooling rate.…”

Applications in the Nuclear Industry for Thermal Spray Amorphous Metal and Ceramic Coatings

“…Examples included thermally sprayed coatings of Fe-10Cr-10-Mo-(C,B), bulk Fe-Cr-Mo-C-B, and Fe-Cr-Mo-C-B-P. [4][5][6] The corrosion resistance of an iron-based amorphous alloy with yttrium (Y), Fe 48 Mo 14 Cr 15 Y 2 C 15 B 6 was also established. [7][8][9] Yttrium was added to this alloy to lower the critical cooling rate. Because nickel-based crystalline materials have excellent corrosion resistance, several nickel-based amorphous metals have also been developed by other researchers and were compared with thermal spray coatings of crystalline materials.…”