New Infiltration Patterns During Pressureless Infiltration of Partially Nitrided Aluminium Preforms

机译：部分氮化铝预成型坯无压渗透过程中的新渗透方式

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Green samples of AA 6061-2Mg-1Sn-3Nylon were processed at 560°C for 12hr under nitrogen to form a contiguous and rigid AIN skeleton. These partially nitrided preforms were then infiltrated with Al-Si alloys of different compositions at various temperatures. When the preforms were infiltrated with a near eutectic Al-Si alloy at a small melt superheat, infiltration occurred in a conventional slug-flow fashion where infiltration proceeded through the advance of a single well-defined infiltration front, which separates the infiltrated and un-infiltrated regions. However, as the infiltration conditions deviate from the eutectic point, either by changing the alloy composition or increasing the melt superheat, the infiltration pattern changes progressively from slug flow to extreme non-slug flow, where infiltration proceeded uniformly across the entire preform without showing a clear infiltration front. The existence of different infiltration patterns is attributed to the competition between thermodynamic and kinetic factors.

机译：将AA 6061-2Mg-1Sn-3Nylon的绿色样品在氮气下于560°C处理12小时，以形成连续且刚性的AIN骨架。然后将这些部分氮化的预成型件在不同温度下渗入不同成分的Al-Si合金。当预成型坯在较小的熔体过热温度下用接近共晶的Al-Si合金渗透时，渗透以传统的弹状流方式发生，其中渗透通过单个定义明确的渗透前沿的进行而进行，该渗透前沿将渗透和未渗透的相分离。渗透区域。但是，随着渗透条件偏离共晶点，无论是通过改变合金成分还是增加熔体过热度，渗透模式都会从团状流逐渐转变为非团状流，在整个预制棒中渗透均匀地进行，而不会显示出清除渗透前线。不同渗透方式的存在是由于热力学和动力学因素之间的竞争。

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来源
《Powder metallurgy world congress amp; exhibition》|2010年|p.641-647|共7页
会议地点 Florence(IT);Florence(IT)
作者
Peng Yu; G.B. Schaffer; Ma Qian;
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作者单位

The University of Queensland, School of Mechanical and Mining Engineering, ARC Centre of Excellence for Design in Light Metals, Qld 4072, Australia;

rnThe University of Queensland, School of Mechanical and Mining Engineering, ARC Centre of Excellence for Design in Light Metals, Qld 4072, Australia;

rnThe University of Queensland, School of Mechanical and Mining Engineering, ARC Centre of Excellence for Design in Light Metals, Qld 4072, Australia;

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原文格式 PDF
正文语种 eng
中图分类粉末冶金（金属陶瓷工艺）;
关键词
Infiltration; slug-flow; composite fabrication; aluminium alloys;

机译：浸润;弹流复合制造；铝合金;

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4. New Infiltration Patterns During Pressureless Infiltration of Partially Nitrided Aluminium Preforms [C] . Peng Yu, G.B. Schaffer, Ma Qian Powder metallurgy world congress exhibitionPM . 2010

机译：部分氮化铝预制件的无气压渗透过程中的新渗透图案
5. Optimum parameters for wetting and pressureless infiltration of silicon carbide preforms by aluminum alloys. [D] . Pech-Canul, Martin Ignacio. 1999

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7. New technique for pressureless infiltration of Al alloys into Al2O3 preforms [O] . Rao Srinivasa B, Jayaram V 2001

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8. Pressureless Infiltration of Ceramics by Molten Metals [R] . Chidambaram, P. R., Edwards, G. R. 1995

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New Infiltration Patterns During Pressureless Infiltration of Partially Nitrided Aluminium Preforms

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