effects of chemical inhomogeneities on grain growth

Effects of barrier layer and annealing on abnormal grain

Jun 04 1998Abnormal (100) grain growth has been characterized in predominantly (111)‐textured Cu thin films as a function of deposition temperature annealing temperature and the presence of a Ta or W underlayer For films deposited at room temperature bimodal grain size distributions are observed at annealing temperatures at or above 150 C for Cu on Ta and 100 C for Cu on W Suppression of (100

Simulation of recrystallization and grain growth

Grain growth is thermodynamically driven by the reduction of the total grain boundary area While recovery and grain growth are relatively slow processes recrystallization follows in most cases sigmoidal-type kinetics i e it can proceed very fast after an initial more sluggish nucleation period

To study the effect of chemical weed control on growth and

Abstract: An experiment entitled To study the effect of Chemical Weed Control on Growth and Yield of Soybean (Glycine max L ) was conducted in Kharif season at student research field College of Agriculture Indore (M P ) The soil of the experimental field was medium black in texture neutral in reaction (pH 7 60) with normal EC (0 45 dS/m) and medium organic carbon contents (0 72%) and

Effect of Silicon Content on the Microstructure and

Oct 17 2012During intercritical annealing a complex interaction between recrystallization grain growth and phase transformation occurs [3 4] The degree of such interplay depends first of all on the chemical composition of the steel (e g microalloying additions) and processing parameters [5 6] Therefore the present study attempts to investigate

Origin and Control of Abnormal Grain Growth in Alumina

Abstract A number of models have been presented to explain the role of MgO on sintering and grain growth of alumina In view of recent experimental results showing that abnormal grain growth (AGG) is related with a small amount of glass-forming impurities the beneficial role of MgO has to be re-evaluated in conjunction with the microstructural evolution of alumina in the presence of such

Watching the Growth of Bulk Grains During

We observed the in situ growth of a grain during recrystallization in the bulk of a deformed sample We used the three-dimensional x-ray diffraction microscope located at the European Synchrotron Radiation Facility in Grenoble France The results showed a very heterogeneous growth pattern contradicting the classical assumption of smooth and spherical growth of new grains during

Effect of the Degree of the Gate‐Dielectric Surface

Mar 29 2020The influence of the gate‐dielectric surface roughness on the thin‐film morphology and the grain density of the vacuum‐deposited DNTT films can be seen in Figure 2e–g: Depositing the DNTT onto a smooth gate dielectric leads to a step‐flow growth and thus to an extended terrace‐like structure which is the structure typically

Modeling of Wetting Phenomena at Grain Boundary Grooves

substrate [8] The stresses and inhomogeneities in the layer then drive diffusion resulting in the non-homogeneous growth Subsequent chemical reaction between the ceramic and the active metal takes place under controlled temperature and in the environment with controlled chemistry The local rate of chemical reaction is

Near

carbon gas precursors growth temperatures catalyst substrate morphology and chemical composition 2 Imaging technique 2 1 Near-field microwave microscope The microwave path of the microscope was designed and manufactured by Agilent Technologies Inc and is electrically close to that described in [37] and [43] The system is

Effect of Reverse Currents during Electroplating on the

May 13 2020Nanotwinned copper (nt-Cu) has been attracting a great deal of attention in the past decades due to its excellent mechanical and electrical properties In this study a new approach periodic-reverse (PR) waveforms is adopted to electroplate nt-Cu films with highly 111 oriented columnar grain microstructures We investigate the effect of the reverse current on the microstructures of 111

GRAIN GROWTH IN LABORATORY PREPARED ICE: SOLUTE

Grain growth experiments were carried out using cylindrical ice samples grown 5 cn long pieces from the ends of the cylinders due to inhomogeneities in crystalline structure Then disks 0 5 cn thick were cut at the ends of each sample in order to is a term of the chemical potential which takes into account the solute rejection to the

Effects of Nonthermal Plasma on Wheat Grains and Products

This paper presents the review of effects of nonthermal plasma (NTP) treatment on both the wheat grains and flour with potential to be applied in practice The NTP can be used in wheat grain surface disinfection grain germination and vitality improving and wheat flour modification and disinfection NTP causes effective decontamination from bacteria and fungi together with insect pests and

Effects of Nonthermal Plasma on Wheat Grains and Products

This paper presents the review of effects of nonthermal plasma (NTP) treatment on both the wheat grains and flour with potential to be applied in practice The NTP can be used in wheat grain surface disinfection grain germination and vitality improving and wheat flour modification and disinfection NTP causes effective decontamination from bacteria and fungi together with insect pests and

Grain Boundary Serration in Nickel

Jun 01 2018Grain boundary serration in the superalloy Inconel 600 was studied Two microstructural variants one with nonserrated and the other with serrated grain boundaries were generated by altering the heat-treatment conditions while keeping other aspects of the microstructure unchanged The effect on the creep response between 700 C and 900 C was measured and the different failure modes

Grain Size and Its Influence on Materials Properties

coarse grain size while finish machining favors fine grain size The effect of grain size is greatest on properties that are related to the early stages of deforma-tion Thus for example yield stress is more dependent on grain size than ten-sile strength [2 3] Fine-grain steels do not harden quite as deeply and have less tendency to crack

Effects of barrier layer and annealing on abnormal grain

Jun 04 1998Abnormal (100) grain growth has been characterized in predominantly (111)‐textured Cu thin films as a function of deposition temperature annealing temperature and the presence of a Ta or W underlayer For films deposited at room temperature bimodal grain size distributions are observed at annealing temperatures at or above 150 C for Cu on Ta and 100 C for Cu on W Suppression of (100

CiteSeerX — ORIGINAL PAPER

Dis-equilibrium element incorporation in garnet due to the development of chemical inhomogeneities around por-phyroblasts leads to pronounced episodic growth and may even cause growth interruptions Discontinuous growth together with pressure- and temperature-dependent changes in garnet chemistry cause zonation patterns that are indicative of

Impact of Grain Evolution on the Chemical Structure of

The main effect of grain evolution on the disk's chemical composition comes from sedimentation and to a lesser degree from reduction of the total grain-surface area The net effect of grain growth is suppressed by the fragmentation process which maintains a population of small grains dominating the total grain surface area

Electron Microscopy Investigation of Detailed

5 1 Co-growth of h-AlN and TiAlN phases 31 5 2 Gas flow effect on Ti and Al deposition 31 5 3 Microstructural inhomogeneity in TiAlN coatings 32 5 4 Diffusion of Cr from a CoCrFeNi substrate through TiN grain boundaries 32 6 Future work 35 6 1 Quantification of chemical

What is a Grain Growth?

Jun 18 2018Grain growth refers to an increase in the size of crystallites (grains) in a material at high temperatures Grain growth is due to an alteration of the internal energy of the molecular structure of a given metal ceramic or mineral Grain growth is typical in metals that have undergone annealing and other processes of surface modification

Effect of impurities on grain growth in cold ice sheets

apparent grain growth constant On the other hand numerical models of grain growth based on Monte Carlo simulations [Anderson et al 1989] or on vertex dynamics [Weygand et al 1998] give values of m very close to the lower bound 2 Therefore departure from m = 2 is thought to result from solute drag [Fan et al 1999] interactions with

Intrinsic Compositional Inhomogeneities in Bulk Ti

Effect of local structural distortion on magnetic and dielectric properties in BiFeO3 with Ba Ti co-doping Physica B: Condensed Matter 2015 468-469 81-84 DOI: 10 1016/j physb 2015 04 023 Jieyu Chen Wenyu Xing Qi Yun Wei Gao Chenghong Nie Shifeng Zhao Effects of Ho Mn co-doping on ferroelectric fatigue of BiFeO3 thin films

Effects of mesoporous structure on grain growth of

Arrhenius equation used to calculate the activation energy for grain growth demonstrates that the activation energy for grain growth was about 38 1 kJ/mol before mesostructure collapse and 11 3 kJ/mol after collapse These results show evidence of two different mechanisms governing the process of grain growth

Effect of strontia on the densification and mechanical

Dec 01 2006The influence of grain growth on the alumina matrix is dependent on the amount and variety of additive as well as the presence or absence of liquid phase during P A Morris R L CobleEffects of chemical inhomogeneities on the grain growth on the grain growth and microstructure in Al 2 O 3 J Am Ceram Soc 73 (1) (1987) pp 130-136

Effect of the Degree of the Gate‐Dielectric Surface

Mar 29 2020The influence of the gate‐dielectric surface roughness on the thin‐film morphology and the grain density of the vacuum‐deposited DNTT films can be seen in Figure 2e–g: Depositing the DNTT onto a smooth gate dielectric leads to a step‐flow growth and thus to an extended terrace‐like structure which is the structure typically