Results 41 to 50 of about 760 (278)

Aspectos da hidratação de óxido de magnésio em formulações de concretos refratários Aspects of magnesium oxide hydration in refractory castables compositions

Cerâmica, 2006
Óxido de magnésio (MgO) ou magnésia é uma das matérias primas mais importantes para a indústria de refratários. Graças à sua elevada refratariedade (ponto de fusão da ordem de 2800 ºC) e resistência à corrosão me meios básicos, associadas a custos ...
R. Salomão, L. R. M. Bittencourt, V. C. Pandolfelli   +2 more
doaj   +1 more source

Advanced Electron Microscopy and Microcomputed Tomography Analysis of Single‐Crystal Ni‐Base Superalloys After Short‐Term Multiaxial Creep

Advanced Engineering Materials, EarlyView.
This work studies the anisotropic behavior of circular notched tensile specimens of Ni‐base superalloy single crystals during high‐temperature tensile creep along [001], [110], and [111]. Correlative scale‐bridging imaging of specimens reveals early rupture along [110] because 1) plastic deformation proceeds faster at notch center; 2) more (brittle ...
Leonardo Agudo Jácome, Lijie Cao, Christoph Somsen, Johannes Boes, René Hesse, Werner Theisen, Gunther Eggeler   +6 more
wiley   +1 more source

Mechanochemically synthesized high alumina cement and their implementation as low cement castables with some micro-fine additives

Journal of Asian Ceramic Societies, 2015
High-energy ball milling viz. mechanochemical process is being utilized to mechanically activate ceramic powders for low temperature solid state reactions. The process can help to select low-cost commercially available oxides and can produce powders with
Vijay Kumar, Vinay Kumar Singh, Abhinav Srivastava, P. Hemanth Kumar   +3 more
doaj   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Podem os dispersantes afetar as propriedades dos concretos refratários após a queima? Could the dispersants affect the properties of refractory castables after firing?

Cerâmica, 2009
A aplicação de concretos refratários é um processo em constante evolução e apresenta uma forte dependência dos avanços dos conhecimentos sobre os ligantes hidráulicos.
I. R. Oliveira, V. C. Pandolfelli
doaj   +1 more source

Improvement in Slag Resistance of No-Cement Refractory Castables by Matrix Design

Ceramics, 2020
The corrosion resistance of spinel containing cement bonded castables has been extensively investigated in the past. However, corrosion of no-cement refractory castables (NCC) has not been widely studied since the use of NCC has been relatively limited ...
Hong Peng, Jun Liu, Qinghu Wang, Yawei Li   +3 more
doaj   +1 more source

High‐Temperature Phase Transformation in a V‐9Si‐6.5B Alloy: The Kinetic and Crystallographic Pathway From V5SiB2 to V8SiB4

Advanced Engineering Materials, EarlyView.
In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti, Andreas Stark, Roja Rani Korrayi, Florian Pyczak, Georg Hasemann   +4 more
wiley   +1 more source

Influência de aditivos dispersantes nas propriedades de concretos refratários de Al2O3 e Al2O3-MgO Influence of dispersants in Al2O3 and Al2O3-MgO refractory castables

Cerâmica, 2004
O estado de dispersão das partículas constituintes da matriz de concretos apresenta uma influência direta no comportamento reológico desses materiais, determinando as técnicas que podem ser usadas para a sua aplicação.
I. R. de Oliveira, A. R. Studart, M. Innocentini, L. A. Nascimento, V. C. Pandolfelli   +4 more
doaj   +1 more source

Refractory Castables for Civil Use: Main Properties Depending on Its Application [PDF]

, 2012
Quick-setting castables for civil use have been developed for the repair of industrial floors, bridges, airport runways, for fixing of metal parts and in those places where quick release is needed for transit.
Camelli, S., Marsiglia, N., Rimoldi, M., Beltran, D., Marinelli, P.   +4 more
core   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source