Application of a control-measuring apparatus and peltier modules in the bulk-metallic-glass production using the pressure-casting method

Abstract

The primary objective of the article is to present an innovative workstation and the test results related to iron-based bulk metallic glasses made by pressure casting into a copper die that is cooled with Peltier modules. A production of bulk metallic glasses by pressure casting into a copper die, including an innovative cooling method is presented in this article. The equipment for the casting, including a modern high-frequency induction heater and a control-measuring apparatus, which enables the repeatability and maintenance of the process parameters, is discussed. Semiconductor Peltier modules for cooling the molds are presented. The tests show that the semiconductor Peltier modules are a suitable substitute for the water cooling of the molds. They enable the casting at 0°C of the molds. Additionally, the ecological and economic aspects of the introduced new methods are presented. The application of the innovative cooling technology also has an influence on a simplification of the equipment construction for the casting process. The test results for the bulk metallic glasses based on iron and obtained with the designed devices are presented in this paper. A structure analysis using X-ray examination and microscopic observation was performed. The diffraction pattern and microscopic observation revealed that the studied as-cast Fe-Co-B-Si-Nb alloy is in the amorphous state. The test results confirmed the amorphous structure of the obtained materials. Keywords: metallic materials, bulk metallic glasses, Peltier modules, Fe-based alloy, pressure casting into a copper die Namen tega~lanka je predstavitev inovativne delovne postaje in rezultatov preizkusov masivnih kovinskih stekel na osnovì eleza, izdelanih s tla~nim litjem v bakreno kokilo, hlajeno s Peltierjevimi moduli. V~lanku je predstavljena izdelava masivnih kovinskih stekel s tla~nim litjem v bakreno orodje z inovativno metodo ohlajanja. Obravnavana je oprema za litje, ki uporablja moderen visokofrekven~ni indukcijski grelnik, opremljen s kontrolno-merilnimi napravami, ki omogo~ajo ponovljivost in vzdr`evanje procesnih parametrov. Predstavljeni so polprevodni{ki Peltierjevi moduli za hlajenje kokile. Preizkusi so pokazali, da so polprevodni{ki Peltierjevi moduli primeren nadomestek vodnega hlajenja kokil. Omogo~ajo ulivanje pri temperaturi kokile 0°C. Dodatno so predstavljeni {e ekolo{ki in ekonomski vidiki nove metode. Uporaba inovativne tehnologije hlajenja vpliva tudi na poenostavitev konstrukcije naprave za ulivanje. V tem delu so predstavljeni rezultati preiskav masivnih kovinskih stekel na osnovi`eleza, dobljenih z novo konstruirano napravo. Analize strukture so bile izvr{ene z rentgensko preiskavo. Posnetki difrakcije in mikroskopska opazovanja so odkrila, da je zlitina Fe-Co-B-Si-Nb v litem stanju amorfna. Rezultati preiskav so potrdili amorfno strukturo dobljenega materiala. Klju~ne besede: kovinski materiali, masivna kovinska stekla, Peltierjevi moduli, zlitine na osnovi Fe, tla~no litje v bakreno kokilo

Structure and Chosen Nanomechanical Properties of Amorphous-Crystalline Laser Weld

“…The sample material was a Zr-Al-Ni-Cu zirconium based alloy. The procedure for obtaining bulk metallic glasses in the form of plates involved the production of an initial alloy in the form of an ingot and then casting the molten alloy into a copper mould [5]. The test alloy was prepared on the basis of pure Zr, Cu, Ni, and Al elements with a total weight of 30 g, using an induction generator in a ceramic crucible.…”

The Influence of Technological Parameters of the Casting Process on the Structure and Selected Properties of Iron-Based Metallic Glasses

“…The presence of Fe-Co-B-Si-Nb amorphous phase in this system has been reported in many research studies [8][9][10][11]. The proof for existence of the amorphous, amorphous-crystalline or crystalline component in metallic glasses has been most often obtained from X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) techniques.…”

Modification of the Al-9%SiMg Alloy with Aluminum, Boron, and Titanium Fast Cooled Mixtures

“…The interactions between "opposing" chemical elements used as * corresponding author; e-mail: tomekl@uwm.edu.pl modifying agents may have an adverse effect on successive alloy modifications. An example may be the interactions between Sb and Sr, and between Sb and Na, which are a serious concern during further processing of modified alloys [1,[12][13][14][15][16].…”