Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: June 2018
Authors: Dalibor Všianský, Karel Dvořák, Simona Ravaszová, Dušan Dolák, Jaroslav Bureš
The tested limestone must contain at least 85% of grains which are smaller than 32 μm.
LO1408 "AdMaS UP - Advanced Materials, Structures and Technologies", supported by the Ministry of Education, Youth and Sports under "National Sustainability Programme I" and by project No. 15-08755S: "Study of the effects of samples preparation on the final properties of inorganic binders" and project number FAST-J-17-4604 “Monitoring the properties of the limestone during thermal loading by DKTA, DSC and XRD-HT methods” References [1] BLASIO, Cataldo De, Ermei MÄKILÄ a Tapio WESTERLUND.
LO1408 "AdMaS UP - Advanced Materials, Structures and Technologies", supported by the Ministry of Education, Youth and Sports under "National Sustainability Programme I" and by project No. 15-08755S: "Study of the effects of samples preparation on the final properties of inorganic binders" and project number FAST-J-17-4604 “Monitoring the properties of the limestone during thermal loading by DKTA, DSC and XRD-HT methods” References [1] BLASIO, Cataldo De, Ermei MÄKILÄ a Tapio WESTERLUND.
Online since: August 2018
Authors: Jie Zhao, Tie Shan Cao, Cong Qian Cheng
The grain size of P92 heat-resistant steel used in the paper is about 30 μm after statistics.
Table 1 Difference between the method of M-tr and the method of M-GSRT Methods σ50000T (MPa) and Errorb Number of sample Total test time (h) 600 ˚C 650 ˚C 700 ˚C Creep data* 125.9a 68.2a 28.2a 3c 150000c M-tr σ50000T 147.5 85.2 42.5 24c 6870c Errorb 17.2 % 24.9 % 50.7 % M-GSRT σ50000T 122.6 69.4 32.7 24c+1d 6870c+96d Errorb -2.6 % 1.8 % 16.0 % a Stress of 50000 hours rupture life gained by the linear interpolation method b Error=(σ50000T- Creep data*)/ Creep data*×100 % & c Data of CRT & d Data of SRT In addition, the creep strength evaluation by the method of M-tr takes 24 CRTs with total creep time of 6870 hours, and the method of M-GSRT takes the 24 CRTs the same to the method of M-tr and 4 SRTs with 96 hours total test time.
Table 1 Difference between the method of M-tr and the method of M-GSRT Methods σ50000T (MPa) and Errorb Number of sample Total test time (h) 600 ˚C 650 ˚C 700 ˚C Creep data* 125.9a 68.2a 28.2a 3c 150000c M-tr σ50000T 147.5 85.2 42.5 24c 6870c Errorb 17.2 % 24.9 % 50.7 % M-GSRT σ50000T 122.6 69.4 32.7 24c+1d 6870c+96d Errorb -2.6 % 1.8 % 16.0 % a Stress of 50000 hours rupture life gained by the linear interpolation method b Error=(σ50000T- Creep data*)/ Creep data*×100 % & c Data of CRT & d Data of SRT In addition, the creep strength evaluation by the method of M-tr takes 24 CRTs with total creep time of 6870 hours, and the method of M-GSRT takes the 24 CRTs the same to the method of M-tr and 4 SRTs with 96 hours total test time.
Online since: July 2014
Authors: Ke Zhang, Zhong Qiu Cao, Shi Wei Wu, Yan Wang, Hao Yu, Na Na Gong
The nanocrystalline hydrides synthesized by high-energy ball milling showed very fast absorption and desorption kinetics due to faster diffusion of hydrogen along grain boundaries, as well as the high number of heterogeneous nucleation sites of the hydride on absorption[10].
Online since: April 2014
Authors: Jana Dobrovská, Vlastimil Vodárek, Irena Andršová, Karel Hrbáček, Božena Podhorná
In addition, the content of carbon and tungsten, which provide hardening by thermally stable carbides, and of niobium, which provides hardening by fine carbides at the grain boundaries, has been increased.
With increasing exposure time the secondary precipitates grow and their number decreases.
With increasing exposure time the secondary precipitates grow and their number decreases.
Online since: July 2021
Authors: Alexander A. Gervash, S.A. Vologzhanina, Boris S. Ermakov, P.Y. Piskarev, A.M. Kudryavceva
In the process of manufacturing HE mock-ups, a large number (about 50% of the total) of mock-ups with defects in the BMJ zone were identified.
Achieved BMJ parameters during technology development Parameter Regulated value Obtained values The grain size of bronze Dav, microns ≤ 200 47.6…190.3 Microhardness of steel, HV < 300 153…161 Tensile strength of bronze Rm at 20°С / 250°С, [МPа] ≥ 280 / 220 308…330 / 243…256 Rupture stress for BMJ on separation at 150°C, [MPa] ≥ 220 283…290 Leak tightness of the joint with 6.0 MPa and 150°С, [Pа×m3×s-1] ≤ 1×10-10 ≤ 9 ×10-12 The previously mentioned defects represent a violation of the integrity of the BMJ (crack) in the corner zones of the HE mock-ups (Fig. 2, a) with a loss of tightness (Fig. 2, b), or with the preservation of the tightness of the layout (Fig. 2, c).
Achieved BMJ parameters during technology development Parameter Regulated value Obtained values The grain size of bronze Dav, microns ≤ 200 47.6…190.3 Microhardness of steel, HV < 300 153…161 Tensile strength of bronze Rm at 20°С / 250°С, [МPа] ≥ 280 / 220 308…330 / 243…256 Rupture stress for BMJ on separation at 150°C, [MPa] ≥ 220 283…290 Leak tightness of the joint with 6.0 MPa and 150°С, [Pа×m3×s-1] ≤ 1×10-10 ≤ 9 ×10-12 The previously mentioned defects represent a violation of the integrity of the BMJ (crack) in the corner zones of the HE mock-ups (Fig. 2, a) with a loss of tightness (Fig. 2, b), or with the preservation of the tightness of the layout (Fig. 2, c).
Online since: November 2016
Authors: A.E.M. Paiva, Edson Jansen Pedrosa Miranda Jr.
In Brazil, the number of studies on this theme is even smaller, e.g., the studied by López et al. [2] and Miranda Jr. [4].
Results and Discussion Grain size distribution and slump test Figure 1 (a) shows a comparative graph of the sand and waste glass particle size distribution.
Results and Discussion Grain size distribution and slump test Figure 1 (a) shows a comparative graph of the sand and waste glass particle size distribution.
Online since: May 2017
Authors: Petr Štěpánek, Lukáš Lyčka
Maximum aggregate grain size size of 8 mm was used with a 20 mm protective layer of concrete for the main flexural reinforcement bars.
Displacement and number of rows were chosen according to the EC2 so that shear failure would occur in the area with shear reinforcement.
Displacement and number of rows were chosen according to the EC2 so that shear failure would occur in the area with shear reinforcement.
Online since: January 2012
Authors: Kim Verbeken, Marc Verhaege, Lode Duprez, Diana Pérez Escobar
Introduction
The interaction between a material and hydrogen plays an important role in quite a number of engineering and scientific fields.
As can be seen on this micrograph, this alloy contains ferrite grains and cementite.
As can be seen on this micrograph, this alloy contains ferrite grains and cementite.
Online since: May 2022
Authors: Siti Fauziah, Indah Raya, Tur Ridha Noer Khalifah, Hasnah Natsir
Introduction
Water hyacinth is a type of plant that floats on the water, is green in color, has a single oval-shaped leaf, and slippery has a flower in the form of grains and petals.
However, there was no strong binding due to the absence of functional groups C=O and C=N at wave number 1690–1640 cm–1, which was a sign of the occurrence of bonds between chitosan-EDTA and chitosan-cellulose [16].
However, there was no strong binding due to the absence of functional groups C=O and C=N at wave number 1690–1640 cm–1, which was a sign of the occurrence of bonds between chitosan-EDTA and chitosan-cellulose [16].
Online since: May 2012
Authors: Yao Bin Li
Besides, the number of gas transfinite in upper corner reduces greatly.
Fresh mixture self-leveling close-grained in the filling pump, after a period of time to natural curing, and it should be demoulded after maturing to a certain strength.
Fresh mixture self-leveling close-grained in the filling pump, after a period of time to natural curing, and it should be demoulded after maturing to a certain strength.