Tribological behaviors of vacuum hot-pressed ceramic composites with enhanced cyclic oxidation and corrosion resistance

Li, Xuewu; Liang, Jingsong; Tian, Shuai; Yang, Danni; Chen, Xinchun; Zhang, Chuanwei; Liu, Zhaohui; Liu, Dianzi; Zhang, Qiaoxin

doi:10.1016/j.ceramint.2020.02.057

Cited by 102 publications

(23 citation statements)

References 46 publications

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“…[7,8] Moreover, the standard electrode potentials of Mg alloys are so low that their specific mass loss rates are high in environments containing chloride ions. [9,10] At the same time, the low purity Mg may lead to an Fe content above the tolerance limit and consequently substantial corrosion rates. [11] Hence, Mg alloys have great potentials as a new type of corrosive materials.…”

Section: Introductionmentioning

confidence: 99%

Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Zhou

Tian

et al. 2020

Materials & Corrosion

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Developing new‐type alloy materials with excellent decomposition properties and mechanical behaviors is a thorny issue for preparing fracturing balls in oil exploitation. As‐cast Mg–xZn–Zr alloys designed by regulating Zn contents have been fabricated in this study. Compressive strength and immersion corrosion test have been investigated to assess their feasibility as decomposition materials. Scanning electron microscopy and X‐ray diffract meter have also been used to characterize surface morphologies and phase structures for determining their decomposition mechanism. Results show that matrix phases and secondary phases with discontinuous reticular features form on the alloys. They also achieve excellent mechanical properties to ensure stability and pressure‐maintaining capacity in the decomposition process in chloride environment. Meanwhile, with Zn content and immersion time increasing, galvanic corrosion effect strengthens leading to accelerated specific mass loss rates of the alloys. Rapid corrosion decomposition of the alloys mainly attributes to anodic dissolution of matrix phases, exfoliation of microparticles, and poor resistance of corrosion products to the decomposition process. This study provides positive insight into the preparation of new‐type Mg alloys for guaranteeing fast decomposition of fracturing balls and also ensuring their compressive strength stability.

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Section: Introductionmentioning

confidence: 99%

Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Zhou

Tian

et al. 2020

Materials & Corrosion

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“…3.1. Laser sintering results Figure 4 shows the SEM image of E12/Bi2Te2.85Se0.15 composite powder prepared by mechanical mixing method [16,17]. As shown in figure 4, compared with the original n-type Bi2Te2.85Se0.15 powder, the composite after experiencing mechanical mixing is more like a collection of spherical balls, the surface of which is evenly wrapped by E12 particulates.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and properties of n-type Bi₂Te₃-based thermoelectric material fabricated by selective laser sintering

Xiong¹,

Zhu²,

Guo-xian³

et al. 2020

Mater. Res. Express

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An n-type Bi 2 Te 3 -based thermoelectric material Bi 2 Te 2.85 Se 0.15 was prepared through an SLS (Selective Laser Sintering) process with E12/Bi 2 Te 2.85 Se 0.15 as composite powder (weight ratio 1:7), from which E12 was degreased after the SLS process. It was studied the effect of laser power, scanning speed and scanning interval on the density and thermoelectric properties of the sintered samples. The laser power was found the most important influential factor, while the scanning interval was the second and the scanning speed the least. The maximum dimensionless thermoelectric figure of merit ZT is about 0.88 in the condition when the laser power, scanning interval and scanning speed were 20 W, 0.26 mm and 3000 mm s −1 , respectively.

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“…where we use a three-dimensional notation, 4 r n dV with Vr n ¼ 0 and V 3 r n ¼ 0 at the boundaries of the integrals. Here two density-dependent terms (K A + pV A À TS A )r n and E 0 A r n 2 appear in the free energy functional that scale differently with respect to the density r n .…”

Section: A Gb In a Pure Substancementioning

confidence: 99%

“…Grain boundaries (GBs) are one of the main sources of heterogeneity in polycrystalline microstructures; they interact with various microstructure elements, e.g. GB networks, 1 secondaryphase particles, [2][3][4] dislocations, [5][6][7] and vacancies, 8,9 while they themselves possess distinct physical properties similar to the bulk phases. A critical source of microstructure heterogeneity is GBs' interaction with solute atoms that inuences both the local and global chemistry of the microstructure.…”

Section: Introductionmentioning

confidence: 99%

A model for grain boundary thermodynamics

Kamachali

2020

RSC Adv.

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Tribological behaviors of vacuum hot-pressed ceramic composites with enhanced cyclic oxidation and corrosion resistance

Cited by 102 publications

References 46 publications

Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Microstructure and properties of n-type Bi₂Te₃-based thermoelectric material fabricated by selective laser sintering

A model for grain boundary thermodynamics

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Tribological behaviors of vacuum hot-pressed ceramic composites with enhanced cyclic oxidation and corrosion resistance

Cited by 102 publications

References 46 publications

Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Corrosion decomposition and mechanical behaviors of As‐cast Mg–xZn–Zr alloys

Microstructure and properties of n-type Bi2Te3-based thermoelectric material fabricated by selective laser sintering

A model for grain boundary thermodynamics

Contact Info

Product

Resources

About

Microstructure and properties of n-type Bi₂Te₃-based thermoelectric material fabricated by selective laser sintering