Preparation of Fiber-Reinforced Shell by Airflow Placement Fiber Technology for Investment Casting

Li, Yanfen; Liu, Xiangdong; Lű, Kai; Du, Xiaoming

doi:10.1007/s40962-019-00323-2

Cited by 19 publications

(7 citation statements)

References 16 publications

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“…In this process for placement fiber, the shorted fibers were uniformly dispersed, and a suspension motion was performed by using a higher gas velocity in the fiber placement device, as described in Figure 2 of the previous published report. 18 Some of the fibers adhered to the surface of shell with wet slurry in a given space. An original report on this method has been published, suggesting that it is possible to prepare fiber-reinforced shell by using airflow placement fiber method.…”

Section: Placement Fiber Processmentioning

confidence: 99%

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Exploration on Preparation Process of High-Strength Fiber-Reinforced Shell for Investment Casting

Liu

Lű

et al. 2020

Inter Metalcast

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The use of fibers as additives to increase the strength of investment casting shell has yielded some significant results. Here, polypropylene fiber of length 6 mm was added to the shell by airflow placement fiber method, and the three different processes [the conventional method, preimmersion silica sol method, and preimmersion slurry method (PSM)] were used to prepare fiber-reinforced shell based on better fiber dispersion; the strength of shell with 0.2-1.0 wt% fiber addition was tested and compared. The experimental results show that the green strength and fired strength of shell with 0.4-0.6 wt% fiber addition reached the maximum in the three processes. The shell prepared by PSM exhibited a higher strength than the other two methods with the same amount of fiber addition; the maximum green strength was 36.9% higher than the strength of fiber-free shell. Combined with the surface morphology of placement fiber and fracture surface morphology of shell, the factors affecting shell strength and interface bonding characteristics were analyzed.

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Section: Placement Fiber Processmentioning

confidence: 99%

“…According to the previous research from the authors, 18 we made comparison with the test results in this paper.…”

Section: Strength Testing Of Fiber-reinforced Shellmentioning

confidence: 99%

Exploration on Preparation Process of High-Strength Fiber-Reinforced Shell for Investment Casting

Liu

Lű

et al. 2020

Inter Metalcast

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“…Furthermore, ablative nylon fibers could raise the permeability and suppress the defects driven by residual gas accordingly. Li et al [9] assessed the properties of polypropylene fiber reinforced silica sol-type shells, perceiving that evenly distributed polypropylene fibers could ameliorate the green strength and fired strength. Elongation and deformation of fibers were detected from the morphology examined by SEM, demonstrating that external forces exerted on the matrix were shared by fiber.…”

Section: Properties Of Fiber Reinforced Plaster Molds For Investment mentioning

confidence: 99%

Properties of fiber reinforced plaster molds for investment casting

Ren

Chen

et al. 2020

China Foundry

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P laster mold investment casting, as an advanced casting technology, has been widely applied in aviation, electronics, etc. Due to its simple preparation, effortless demolding, and promising replication of investment casting molds, plaster molds are commonly employed in the manufacture of thin-walled complex castings with high precision demand [1-3]. According to the requirements of molds suggested by Jones and Yuan [4] , a qualified mold is supposed to have sufficient strength and thermal shock resistance to withstand the impact of external forces during various processes in casting, while high dimensional stability

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“…die casting, sand casting, forging etc. [1][2][3][4][5]. Generally, a good CSm requirement involved an adequate strength and mould permeability to be operating at higher casting temperatures [2,4,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Basically, the strength of unfired CSm is depending on refractory particles bonded with colloidal silica which are in loose particles form. The most significant strengthening technique is incorporating organic fibers into the slurry, which acts as a composite reinforcing agent [1]. Usually, cracking mechanism easily occurred in CSm structure during the autoclave wax removal, which can be avoided via fiber-matrix incorporation.…”

Section: Introductionmentioning

confidence: 99%

Toughening of Ceramic Shell Mould with Rice Husk Fiber (CSm-RH) to Improve Strength Property and Mould Performance

Kamarudin

Harun

Hussain

et al. 2021

EmAIT

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For ages, ceramic shell mould (CSm) have been extensively applied in investment casting industry. The formation of CSm requires multiple steps of dipping, layering drying and firing stages. The later steps are very crucial as the solidification thin layer CSm that consist of loose ceramic particles easily cracks when exposed to the higher thermal effect. The inclusion of fiber or any reinforces phases is able to enhance fired ceramic body and also strengthen the green ceramic structure. Thus, the feasibility of rougher NaOH treated rice husk fiber (RHT) prior embedded into composited structure has shown a significant CSm improvement by induced a better adhesion properties and larger bonding area with brittle ceramic matrix, resulted in increased green strength (1.34 MPa) and fired body strength (4.32 MPa). Owing to the decomposed of lignin layer in CSm with untreated rice husk fiber (CSm-RHU) exhibited a higher porosity that provide a better permeation paths of air flow during molten metal pouring as increased 30 % from the standard CSm permeability, giving an enormous benefit for investment casting cooling process. Overall, the incorporation of RHT fiber in a CSm matrix of both green and fired body governed in toughening of brittle ceramic body, hence avoid failure to the casting mould.

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Preparation of Fiber-Reinforced Shell by Airflow Placement Fiber Technology for Investment Casting

Cited by 19 publications

References 16 publications

Exploration on Preparation Process of High-Strength Fiber-Reinforced Shell for Investment Casting

Exploration on Preparation Process of High-Strength Fiber-Reinforced Shell for Investment Casting

Properties of fiber reinforced plaster molds for investment casting

Toughening of Ceramic Shell Mould with Rice Husk Fiber (CSm-RH) to Improve Strength Property and Mould Performance

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