Study on preparation and properties of molybdenum alloys reinforced by nano-sized ZrO2 particles

Cui, Chaopeng; Gao, Yimin; Wei, Shizhong; Zhang, Guoshang; Zhou, Yucheng; Zhu, Xiaodong; Guo, Sijia

doi:10.1007/s00339-016-9743-1

Cited by 35 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be observed from Figure 2, with the increase of adding amount, the grain of alloy is reduced, which will influence the performance of the electrode. Therefore, the alloy prepared through using the new method has better distribution and small grain size, and the second phase particle size is only 200 nanometers as shown in the figure [17][18][19][20][21][22][23].…”

Section: Resultsmentioning

confidence: 99%

Study on the erosion of Mo/ZrO2 alloys in glass melting process

Cui

Zhu

et al. 2020

High Temperature Materials and Processes

View full text Add to dashboard Cite

The Mo/ZrO2 electrode was prepared by combining hydrothermal synthesis with powder metallurgy, and this new electrode material has a totally different microstructure from the conventional electrode. The grain size of the new electrode was fine, and the size of ZrO2 in the alloy reached 200 nm. According to the results, the Mo–ZrO2 electrode has better performance, because the erosion occurs along the grain boundaries. Meanwhile, the new electrode, based on its fine grain, can effectively improve the corrosion resistance of the electrode.

show abstract

Section: Resultsmentioning

confidence: 99%

Study on the erosion of Mo/ZrO2 alloys in glass melting process

Cui

Zhu

et al. 2020

High Temperature Materials and Processes

View full text Add to dashboard Cite

show abstract

“…Molybdenum (Mo) is physically and chemically similar to W although has a lower melting temperature and lower density, which make it widely used in high-tech fields including sputtering target, electronic devices, nuclear reactors, and other applications where the specific strength and weight are important. [51,52,[184][185][186] Mo powder is conventionally sintered at 2000-2400 °C and under the controlled hydrogen atmosphere to reach 90-95% TD. [33] Upon sintering Mo to high density, its grain size is very difficult to control due to the high temperature and the lack of second phase pinning.…”

Section: Molybdenummentioning

confidence: 99%

“…In Figure we summarized the Vickers hardness ( H avg ) of dense refractory metals produced by PM as a function of G avg . [ 44–78 ] While the beneficial grain boundary strengthening clearly holds, most of the data points in the literature fall in the coarse‐grained (CG) regime with G avg > 1 µm and only a few ones (high‐entropy or oxide‐dispersed strengthened refractory metal alloys) reach to 500 nm < G avg < 1 µm in the fine‐grained (FG) regime. Recently, we have introduced pressureless two‐step sintering (TSS) to refractory metals and alloys and made technological breakthroughs in producing dense UFG W, Mo, and W‐Re alloys to record‐fine grain sizes around 300 nm.…”

Section: Introductionmentioning

confidence: 99%

Powder Metallurgy Route to Ultrafine‐Grained Refractory Metals

Zhang

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Ultrafine‐grained (UFG) refractory metals are promising materials for applications in aerospace, microelectronics, nuclear energy, and many others under extreme environments. Powder metallurgy (PM) allows to produce such materials with well‐controlled chemistry and microstructure at multiple length scales and near‐net shape manufacturing. However, sintering refractory metals to full density while maintaining a fine microstructure is still challenging due to the high sintering temperature and the difficulty to separate the kinetics of densification versus grain growth. Here an overview of the sintering issues, microstructural design rules, and PM practices towards UFG and nanocrystalline refractory metals are sought to be provided. The previous efforts shall be reviewed to address the processing challenges, including the use of fine/nanopowders, second‐phase grain growth inhibitors, and field‐assisted sintering techniques. Recently, pressureless two‐step sintering has been successfully demonstrated in producing dense UFG refractory metals down to ≈300 nm average grain size with a uniform microstructure and this technological breakthrough shall be reviewed. PM progresses in specific materials systems shall be next reviewed, including elementary metals (W and Mo), refractory alloys (W‐Re), refractory high‐entropy alloys, and their composites. Last, future developments and the endeavor towards UFG and nanocrystalline refractory metals with exceptionally uniform microstructure and improved properties are outlined.

show abstract

“…Zirconia (ZrO 2 ) is widely used in various advanced structural ceramics [1], electronic devices [2], and high-temperature ceramics because of its low thermal conductivity [3], high mechanical strength, and relatively high thermal expansion coefficient [4]. ZrO 2 exists in three main polymorphic phases [5], namely, tetragonal, monoclinic, and cubic.…”

Section: Introductionmentioning

confidence: 99%

pH-responsive lyotropic liquid crystals for the preparation of pure cubic zirconia nanoparticles

Liu

Zhang

et al. 2016

Appl. Phys. A

View full text Add to dashboard Cite

We present a lyotropic liquid crystal system consisting of SDS/Triton X-100/water at 25°C. This system is respond to pH variations with a phase switch. When pH is altered from alkaline (pH 13) to acidic (pH 2) conditions, phase change occurs from a bicontinuous hexagonal phase to a partially hexagonal phase until it disappears. The hexagonal phase under alkaline conditions is stable. Thus, this system is an ideal candidate for the preparation of pure cubic ZrO 2 nanoparticles. XRD results confirm that the as-synthesized powder is composed of pure cubic ZrO 2 . These nanoparticles also exhibit a thermal stability of up to 800°C. The size and morphological characteristics of the nanoparticles are greatly affected by ZrOCl 2 concentration. The mechanism of zirconia nanoparticle synthesis in a lyotropic hexagonal phase was proposed.

show abstract

Study on preparation and properties of molybdenum alloys reinforced by nano-sized ZrO2 particles

Cited by 35 publications

References 17 publications

Study on the erosion of Mo/ZrO2 alloys in glass melting process

Study on the erosion of Mo/ZrO2 alloys in glass melting process

Powder Metallurgy Route to Ultrafine‐Grained Refractory Metals

pH-responsive lyotropic liquid crystals for the preparation of pure cubic zirconia nanoparticles

Contact Info

Product

Resources

About