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Research Papers: Friction and Wear

Study on the Friction and Wear Characteristics of Tungsten Carbide and Zirconium With Phosphor-Containing Liquid

[+] Author and Article Information
Myeong-Woo Ha

Department of Mechanical Engineering,
Inha University,
100, Inha-ro, Nam-gu,
Incheon, South Korea
e-mail: hamyungwoo@naver.com

Kwang-Hee Lee

Department of Mechanical Engineering,
Inha University,
100, Inha-ro, Nam-gu,
Incheon, South Korea
e-mail: gwanghee.yee@gmail.com

Chul-Hee Lee

Department of Mechanical Engineering,
Inha University,
100, Inha-ro, Nam-gu,
Incheon, South Korea
e-mail: chulhee@inha.ac.kr

Jong-Myung Choi

Protec Co., Ltd,
43, Namdongseo-ro 330beon-gil, Namdong-gu,
Incheon, South Korea
e-mail: jmchoi@protec21.co.kr

Jun-Wook An

Department of Mechanical Engineering,
Inha University,
100, Inha-ro, Nam-gu,
Incheon, South Korea
e-mail: figurejun34@gmail.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received October 26, 2015; final manuscript received June 18, 2016; published online October 10, 2016. Assoc. Editor: Dae-Eun Kim.

J. Tribol 139(3), 031601 (Oct 10, 2016) (10 pages) Paper No: TRIB-15-1385; doi: 10.1115/1.4034022 History: Received October 26, 2015; Revised June 18, 2016

The dispenser ejects the ceramic filler and phosphor-containing liquid for making various products. When the particle-containing liquid is ejected under high-velocity conditions, however, the ejection reliability decreases because of the wear of the contact surface between the rod and nozzle even though these components are made of hard materials. It is therefore necessary to characterize the friction and wear properties of the hard materials, tungsten carbide (WC) and zirconium (Zr), with the high-viscosity liquid-containing nitride or yttrium aluminum garnet (YAG) particles under reciprocating conditions. Particle contents of 15 wt.% and 30 wt.% are added to the liquid. A reciprocating test was implemented to this end, and WC and Zr specimens were used. The liquid used in the experiment contains nitride and YAG. The experimental results show that the particles inside the liquid are worn out, leading to particle lubrication and the decrease in the coefficient of friction. Also, it is confirmed that the more the particles are, the less the coefficient of friction is due to particle lubrication. For each experimental condition, the coefficient of friction is measured and compared. Moreover, the contact surface of the specimen is analyzed using an electron microscope, and a profilometer is used to measure the surface roughness of the specimen before and after the test. The reciprocation friction and wear characteristics of WC and Zr with phosphor-containing liquid are evaluated by analyzing the experimental results.

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Figures

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Fig. 1

Schematic of the dispensing system

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Fig. 2

Reciprocating friction and wear tester

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Fig. 3

Specimen of pin and plate: (a) WC and (b) Zr

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Fig. 4

Microscopic images of liquid with phosphor: (a) nitride 15 wt.%, (b) nitride 30 wt.%, (c) YAG 15 wt.%, and (d) YAG 30 wt.%

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Fig. 5

The coefficient of friction for the base liquid

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Fig. 6

The coefficient of friction for different types of phosphor

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Fig. 7

Shape of phosphor particle after the tests in WC: (a) WC–15 wt.% nitride, (b) WC–30 wt.% nitride, (c) WC–15 wt.% YAG, and (d) WC–30 wt.% YAG

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Fig. 8

The coefficient of friction for the weight portion

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Fig. 9

Wear surface images of (a) WC–15 wt.% nitride, (b) WC–30 wt.% nitride, (c) WC–15 wt.% YAG, and (d) WC–30 wt.% YAG conditions

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Fig. 10

The coefficient of fiction for Zr–30 wt.% nitride: original test and retest

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Fig. 11

Shape of phosphor particle after the tests in Zr: (a) Zr–15 wt.% nitride, (b) Zr–30 wt.% nitride, (c) Zr–15 wt.% YAG, and (d) Zr–30 wt.% YAG

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Fig. 12

Wear surface images of (a) Zr–15 wt.% nitride, (b) Zr–30 wt.% nitride, (c) Zr–15 wt.% YAG, and (d) Zr–30 wt.% YAG conditions

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Fig. 13

Surface roughness of the experiment in each condition

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Fig. 14

Surface profile of WC conditions: (a) before the test, (b) nitride 15 wt.%, (c) nitride 30 wt.%, (d) YAG 15 wt.%, and (e) YAG 30 wt.%

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