High-temperature tribological properties of spark-plasma-sintered Al2O3 composites containing barite-type structure sulfates

Murakami, Takashi; Ouyang, Jia‐Hu; Sasaki, Shinya; Umeda, Kazunori; Yoneyama, Yuya

doi:10.1016/j.triboint.2005.09.013

Cited by 59 publications

(18 citation statements)

References 29 publications

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“…From the friction and wear data, the spark-plasma-sintered ZrO 2 (Y 2 O 3 )-Al 2 O 3 -Ba x Sr 1-x SO 4 (x = 0.25, 0.5, 0.75) composites show great potential for applications of self-lubricating sliding ceramic components at high temperature. With respect to some alkali-earth metallic sulfates, it is reported that BaSO 4 and SrSO 4 are easily softened, and form lubricating films on the worn surfaces to effectively reduce friction and wear at elevated temperature [8,12,[14][15][16]. As Ba x Sr 1-x SO 4 (x = 0.25, 0.5, 0.75) have the same barite-type crystal structure like BaSO 4 and SrSO 4 , it is inferred that they can also offer much promise as effective solid lubricants at high temperature.…”

Section: Discussionmentioning

confidence: 99%

“…The wear tests of the composites were performed by using a ball-on-block high-temperature tribometer in dry sliding against a 9.53 mm Al 2 O 3 ball [14]. The commercial Al 2 O 3 bearing balls were used in the as-received condition with a surface roughness of 0.02 lm (Ra), a hardness of 16.5 GPa and a density of 3.95 g/cm 3 .The specimens were made of as-sintered composites with a size of 15 9 10 9 9 mm 3 .…”

Section: Methodsmentioning

confidence: 99%

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Tribological Properties of Spark-Plasma-Sintered ZrO2(Y2O3)–Al2O3–Ba x Sr1−x SO4 (x = 0.25, 0.5, 0.75) Composites at Elevated Temperature

Ouyang

Sasaki

2011

Tribol Lett

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Self-lubricating ZrO 2 (Y 2 O 3 )-Al 2 O 3 -Ba x Sr 1-x SO 4 (x = 0.25, 0.5, 0.75) composites have been fabricated by spark plasma sintering (SPS) method. The tribological properties have been evaluated using a high-temperature friction and wear tester at room temperature and 760°C in dry sliding against alumina ball. The composites exhibit distinct improvements in effectively reducing friction and wear, as compared to the unmodified ZrO 2 (Y 2 O 3 )-Al 2 O 3 ceramics. The ZrO 2 (Y 2 O 3 )-Al 2 O 3 -Ba x Sr 1-x SO 4 (x = 0.25, 0.5, 0.75) composites have great low and stable friction coefficients of less than 0.15 and wear rates in the order of 10 -6 mm 3 /Nm at 760°C. Delamination is considered as the dominating wear mechanism of the composites at room temperature. At elevated temperature, the formation and effective spreading of Ba x Sr 1-x SO 4 (x = 0.25, 0.5, 0.75) lubricating films during sliding play an important role in the reduction of the friction and wear.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Tribological Properties of Spark-Plasma-Sintered ZrO2(Y2O3)–Al2O3–Ba x Sr1−x SO4 (x = 0.25, 0.5, 0.75) Composites at Elevated Temperature

Ouyang

Sasaki

2011

Tribol Lett

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“…The high temperature lubricious behavior of some sulfates, chromates, molybdates and tungstates has been extensively studied [60][61][62][63][64][65][66]. Important early work on high-temperature solid lubricant reported that molybdates appeared to be the promising high-temperature solid lubricants [56].…”

Section: Effect Of Solid Lubricant On the Tribological Behaviormentioning

confidence: 99%

High Temperature Self-Lubricating Materials

Bi¹,

Zhu²,

Liu³

2013

Tribology in Engineering

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“…From the NASA research, a metal-combined chrome oxide doped with silver and BaF 2 /CaF 2 eutectic lubricants provided good friction and wear properties over a wide temperature range [4]. In particular, our previous study have exhibited that the alumina matrix composite containing BaSO 4 exhibited friction coefficients between 0.2 and 0.5 and wear rate of 10 -5 mm 3 /Nm in the temperature range from room temperature to 800 in air [6].However, only a limited amount of experiments have been done on these high-temperature lubrication of ceramic matrix composite. It is not clear that the effect of solid lubricants on composites properties and lubricating mechanism.…”

Section: Introductionmentioning

confidence: 97%

Tribological Properties of Spark-Plasma-Sintered Al2O3-SrSO4 Self-Lubricating Nanocomposites at Elevated Temperatures

Ouyang

Wang

et al. 2009

Advanced Tribology

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Spark plasma sintering (SPS) is employed to fabricate the self-lubricating Al 2 O 3 -SrSO 4 nanocomposites by tailoring the chemical compositions. Their friction and wear properties have been evaluated using a high temperature friction and wear tester from room temperature to 600 in dry sliding against alumina ball. Nanosized SrSO 4 powders were synthesized by chemical precipitation process at room temperature and atmospheric pressure. For a comparative study, SrSO 4 solid lubricants with different particle sizes are intentionally designed to investigate the influence of size effect on self-lubricating properties of Al 2 O 3 -SrSO 4 nanocomposites under the identical test conditions. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to investigate microstructure and self-lubrication mechanisms of nanocomposites after wear tests at different temperatures. Al 2 O 3 -SrSO 4 nanocomposites with optimum compositional combinations exhibit low and stable friction coefficients of 0.18 to 0.29 and wear rates in the order of 10 -3 to 10 -5 mm 3 /Nm at high temperatures. With increasing test temperature, plastic deformation of SrSO 4 during sliding plays an important role in formation of lubricating films on worn surfaces of nanocomposites. These lubricating films reduce the friction and wear of the Al 2 O 3 -SrSO 4 nanocomposites.

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High-temperature tribological properties of spark-plasma-sintered Al2O3 composites containing barite-type structure sulfates

Cited by 59 publications

References 29 publications

Tribological Properties of Spark-Plasma-Sintered ZrO2(Y2O3)–Al2O3–Ba x Sr1−x SO4 (x = 0.25, 0.5, 0.75) Composites at Elevated Temperature

Tribological Properties of Spark-Plasma-Sintered ZrO2(Y2O3)–Al2O3–Ba x Sr1−x SO4 (x = 0.25, 0.5, 0.75) Composites at Elevated Temperature

High Temperature Self-Lubricating Materials

Tribological Properties of Spark-Plasma-Sintered Al2O3-SrSO4 Self-Lubricating Nanocomposites at Elevated Temperatures

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