Results 51 to 60 of about 2,056 (126)

Chemically induced local lattice distortions versus structural phase transformations in compositionally complex alloys

npj Computational Materials, 2021
Recent experiments show that the chemical composition of body-centered cubic (bcc) refractory high entropy alloys (HEAs) can be tuned to enable transformation-induced plasticity (TRIP), which significantly improves the ductility of these alloys.
Yuji Ikeda, Konstantin Gubaev, Jörg Neugebauer, Blazej Grabowski, Fritz Körmann   +4 more
doaj   +1 more source

Low-alloy content Ti-Mo-based alloys with large superelasticity and narrow stress hysteresis for potential biomedical applications

Materials Research Letters
In most Ni-free Ti-Nb- and Ti-Zr-based superelastic alloys, large amounts of high-cost and rare elements such as Nb, Ta, Hf and/or Zr are contained, increasing the cost and fabrication difficulty of the alloy.
Shuanglei Li, Xu Wang, Tae-Hyun Nam, Junha Yang, Jong-Taek Yeom   +4 more
doaj   +1 more source

Determination of Rare Earth Elements and Nb, Ta, Zr, Hf in Polymetallic Mineral Samples by Inductively Coupled Plasma-Mass Spectrometry Coupled with Open Acid Dissolution and Lithium Metaborate Alkali Fusion

Yankuang ceshi, 2020
BACKGROUND Mixed acid open acid dissolution and alkali fusion methods are the two main dissolution methods for determination of rare earth and refractory elements in geological samples by inductively coupled plasma-mass spectrometry (ICP-MS).
MEN Qian-ni, SHEN Ping, GAN Li-ming, FENG Bo-xin   +3 more
doaj   +1 more source

Materials design workflow for extreme environments via computational method: Transition metal-doped (Hf0.5Ta0.5)C

Journal of Materials Research and Technology
The development of materials such as superalloys, ceramics, and composites for use in extreme environments poses major challenges owing to difficulties associated with those environments, including thermal shock and oxidation.
Junyoung Choi, Hyokyeong Kim, Inseong Bae, Hayoung Son, Jiwoong Kim   +4 more
doaj   +1 more source

From subduction to extension: The tectonomagmatic evolution of the Bulgarian Rhodopes [PDF]

, 2011
The Bulgarian Rhodopes provide an unique opportunity to study processes that take place at convergent continental margins. Ophiolite complexes incorporated in the Rhodopean nappe stack as well as the directly overlying post-collisional volcanism allow ...
Kirchenbaur, Maria
core  

Chemical signatures of magmas at times of frontal arc migration: Examples from the Central Andes and southern Central America

, 2006
Within the Central Andes (27?-28.5? S) and in southeastern Central America (7?-11? N), discrete episodes of late Miocene-Pliocene frontal arc migration were accompanied by backarc slab shallowing and increased rates of forearc subduction erosion.
Goss, Adam R.
core   +1 more source

Plasticity and strength of an equiatomic and a non-equiatomic HfNbTaTiZr high entropy alloy during uniaxial loading : a molecular dynamics simulation study

Materials Research Express
Understanding plasticity and strength of high entropy alloys of HfNbTaTiZr is extremely significant in building nuclear reactors, gas turbines, aerospace devices etc.
Puja Bordoloi, Manash Protim Hazarika, Ajay Tripathi, Somendra Nath Chakraborty   +3 more
doaj   +1 more source

Hydrothermal Geochemistry and Mineralizing Processes in the T Zone, Thor Lake Rare-element Deposit, Northwest Territories [PDF]

, 2014
The Thor Lake rare-metal (Y-REE-Nb-Ta-Zr-Be) deposit, located about 100 kilometers southeast of Yellowknife, Northwest Territories, Canada, is regarded as one of the largest high field strength elements (HFSE, including Nb, Ta, Zr, Hf, Ti, Y, and the ...
Feng, Yonggang
core   +1 more source

Caracterização Eletroquímica das Ligas Ni62Nb38 e Ni59.24Nb37.76B3.00 Com Estruturas Amorfas e Cristalinas [PDF]

Nickel-based alloys are widely used in industry due to their remarkable corrosion resistance. Currently, most of these alloys are processed with crystalline structure.
Aliaga, Luis César Rodríguez, Bastos, Ivan Napoleão, Carvalho, Marcos Paulo Moura de, Costa, Emandro Vieira da, Cruz, Daniel Magalhães da, Silva, Marcelo Lemos da   +5 more
core   +1 more source

Enrichment characteristics and genesis mechanism of critical elements (Nb-Ta-Zr-Hf-REE-Y) in coals: a case study of Late Permian coalfield in Northeastern Guizhou, China

Frontiers in Earth Science
The discovery of coal-type beneficial metal deposits and corresponding genesis mechanisms are cutting-edge issues in current sedimentary environment research. Based on industrial analysis, mineralogy, and geochemical measurement of seven typical mines in
Ziyi Ye, Baoqing Li, Jialiang Cao
doaj   +1 more source