通过激光干扰诱导的微观散热器从金属表面增加热传递
Frederic Schell1, Richard Chukwudi Okafor1, Tobias Steege1
1Fraunhofer Institute for Material and Beam Technology IWS, Winterbergstr. 28, 01277 Dresden, Germany.
Micromachines
|September 28, 2023
概括
研究人员使用直接激光干扰模式 (DLIP) 开发了微结构,以增强散热. 这种方法显著增加了表面积,并改善了微电子元件的热管理.
科学领域:
- 材料科学 材料科学 材料科学
- 热力工程是热力工程中的一个.
- 表面工程是什么?表面工程是什么?
背景情况:
- 增加微电子的处理能力需要先进的散热解决方案.
- 电子设备的空间限制需要有效的热管理策略.
- 微尺度表面结构提供了一种增强热传输的潜在途径.
研究的目的:
- 为了研究增加表面积的周期性微观结构的制造.
- 为了评估这些微观结构对散热的影响.
- 为了将表面积增大与热性能相关联.
主要方法:
- 使用纳米秒脉冲红外激光直接激光干扰模式 (DLIP) 在不钢上制造周期性微结构.
- 微观结构的表征,以确定开发的界面面积比和峰值到谷深.
- 使用佩尔蒂埃元件估计散热量,并测量输出电压.
主要成果:
- 周期距离为8.5微米的微结构实现了高峰到低谷的深度高达12.8微米.
- 通过优化结构参数,表面积增加了高达394%.
- 观察到散热量的最大增加为51.4%,与结构深度和表面积相关.
结论:
- 直接激光干扰模式 (DLIP) 是一种有效的方法,用于创建显著增强表面积的微结构.
- 通过微结构增强的表面积可以在自然对流环境中改善散热.
- 开发的界面面积比和结构深度是优化纹理表面热性能的关键参数.
相关概念视频
01:14Mechanisms of Heat Transfer I
4.3K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.3K
01:20Mechanisms of Heat Transfer II
3.3K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.3K
01:14Mechanisms of Heat Transfer
353
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
353
01:19Mechanism of heat transfer
1.2K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.2K